Musculoskeletal Tumor Society Functional Score Research Articles

Cup and Cage Reconstruction for Metastatic Acetabular Lesions Provides Functional Improvement and Cost-efficiency

Objective: Pathologic acetabular lesions have multiple surgical options proposed and no clearly defined optimal solution at this time. In this study, we present our cage and cup reconstruction method and analyze postoperative outcomes against previously published studies. Patients and Methods: Twenty-four patients from 2014 to 2020 with acetabular pathologic lesions treated with an antiprotrusio cage and cup reconstruction were identified. Patient charts were reviewed for operative time, blood loss, Musculoskeletal Tumor Society functional scores, follow-up, and complications. Results: The average blood loss was 727 mL, and the average postoperative Musculoskeletal Tumor Society score was 70.3, with an average improvement of 35.2 points from preoperative scores. The average cost of our construct per year was $1177 for patients surviving >1 year after surgery. Eleven (45%) patients had died of disease at an average survival time of 14.2 months. Conclusion: Our study compares well with historic reconstruction strategies for metastatic acetabular disease, showing that this cup/cage reconstruction provides a durable and perioperatively safe approach that provides functional improvement while remaining cost-efficient. Level of Evidence: Level IV.

Precise single column resection and reconstruction with femoral head plus total hip replacement for primary malignant peri-acetabulum tumors

To evaluate whether single acetabular column can be reserved and the effect of reconstruction with femoral head plus total hip replacement (THR) for primary malignant peri-acetabulum tumors. From 2007 to 2015, nineteen patients with primary malignant peri-acetabulum tumors were enrolled. All cases underwent single column resection with clear surgical margins. Ten of the 19 tumor’s resections were assisted by computer navigation. Femoral heads were applied to reconstruct anterior or posterior column defects; THR was used for joint reconstruction. The surgical safety, oncologic outcome and prosthesis survivorship and function were evaluated by regular follow-up. The average follow-up period was 65.9 months. Surgical margins contained wide resection in 12 cases and marginal resection in 7 cases. One patient with Ewing's sarcoma died 14 months postoperative due to lung metastasis. One case with chondrosarcoma had recurrence. One prosthesis was removed due to infection. The average MusculoSkeletal Tumor Society (MSTS) function score was 83.7%. Due to the relative small number of cases, there was no significant difference in the recurrence rate and prosthesis failure rate between the navigation group and non-navigation group. Single column resection and reconstruction with femoral head autograft plus THR is an effective, safe method with less complication rate and better functional outcome for patients with peri-acetabular tumors.

Results of Allografts and Synthetic Grafts in Humeral Simple Bone Cysts.

Simple bone cysts (SBCs) are the most common benign bone lesions in childhood. There are many different methods in the treatment of SBCs. There is no consensus on which method to use in the treatment. In this study, we compared the results of allogeneic bone graft or synthetic bone graft in addition to fl exible intramedullary nail (FIN) for SBC located in the humerus. This retrospective study comparing the data of 19 (group 1: 8 curettage, allograft and FIN; group 2: 11 curettage, synthetic graft and FIN) patients with a mean age of 11.4 (6 to 26; seven female, twelve male) who were surgically treated in our hospital for humeral SBC between April 2014 and January 2020. Patient data included age, sex, anatomical side, stage of the cyst, pathological fracture, previous treatments and complications. The mean follow-up period was 33.7 months (12 to 61). The average last follow-up Musculoskeletal Tumor Society functional scores for groups 1 and 2 were 27.8 (20 to 30) and 28.6 (21 to 30) (P > 0.05). Complete or signifi cant partial radiographic healing rates were achieved in group 1 (75%) compared with group 2 (81.9%). The reoperation rates for groups 1 and 2 were 62.5% (5/8; three for nails removed, two for recurrence) and 36.3% (4/11; two for nails removed, two for recurrence). One patient in group 2 had a 15° varus deformity due to recurrence. No other complications were observed. The combination of curettage-grafonage FIN is a common treatment method in recent years, as it provides early cyst healing and limb mobilization in SBCs located in the upper extremity. For defects after curettage of the bone cysts, allogeneic or synthetic grafts (granule b-tricalcium phospate) which have similar results in terms of healing can be used as an alternative to each other. allografts, bone cysts, bone nails, synthetic grafts, humerus.

What Is the Revision-free Survival of Resurfaced Allograft-prosthesis Composites for Proximal Humerus Reconstruction in Children With Bone Tumors?

What Is the Revision-free Survival of Resurfaced Allograft-prosthesis Composites for Proximal Humerus Reconstruction in Children With Bone Tumors?

Intramedullary nailing versus cemented plate for treating metastatic pathological fracture of the proximal humerus: a comparison study and literature review

BackgroundPathological fracture of the humerus causes severe pain, limited use of the hand, and decreased quality of life. This study aimed to compare the outcomes of intramedullary nailing and locking plate in treating metastatic pathological fractures of the proximal humerus.MethodsThis retrospective comparison study included 45 patients (22 male, 23 female) with proximal humerus metastatic pathological fractures who underwent surgical treatment between 2011 and 2022. All data were collected from medical records and were analyzed retrospectively. Seventeen cases underwent intramedullary nailing plus cement augmentation, and 28 cases underwent locking plate plus cement augmentation. The main outcomes were pain relief, function scores, and complications.ResultsAmong 45 patients with mean age 61.7 ± 9.7 years, 23 (51.1%) had multiple bone metastases, and 28 (62.2%) were diagnosed with impending fractures. The nailing group had significantly lower blood loss [100 (60–200) versus 500 (350–600) ml, p < 0.001] and shorter hospital stay (8.4 ± 2.6 versus 12.3 ± 4.3 days, p < 0.001) than the plating group. Average follow-up time of the nailing group was 12 months and 16.5 months for the plating group. The nailing group had higher visual analog scale (VAS) scores than the plating group, indicating greater pain relief with nailing [7 (6–8) versus 6 (5–7), p = 0.01]. Musculoskeletal Tumor Society functional scores [28 (27–29) versus 27 (26.5–28.5), p = 0.23] were comparable between groups. No complications, local recurrence, or revision surgery were reported until the last follow-up in either group. However, one case in the plating group had a humeral head collapse and fragmentation without needing revision surgery.ConclusionsIntramedullary nailing with cement augmentation is a viable option for treating proximal humerus metastatic pathological fracture, providing rigid fixation and better pain relief resulting in earlier mobility to optimize functional outcomes. Less invasive procedure with less blood loss and shorter hospital stay also benefits patients.Level of evidence Level II.Trial registration statement Not applicable.

Use of locked plates and mono-rail fixator in segmental tibial defects: A prospective interventional study

IntroductionThe management of gap non-union is a major challenge to both the clinician and the patient as it is technically difficult, time-intensive, and physically arduous for the patient along with an unpredictable result. Gap non-union can arise from extrusion of bony fragment at the time of trauma or after debridement of unhealthy bone later. Moreover, Tibia because of its subcutaneous anatomy can easily undergo bone-loss and segmental defect. Among various methods available for managing gap non-union of tibia distraction osteogenesis using either ilizarov fixator or mono-rail fixator is the most popular one. Here we present functional and bony outcomes of combined use of locking plate and Limb Reconstruction System (LRS) in tibial gap non-union and assess whether it decreases fixator time and related complications. Patients and methodsA prospective intervention study constituting 10 patients with Paley's type B1 tibial gap non-union over a period of 22months. In first stage, debridement was done; tibial locking plate and mono-rail fixator were applied along with corticomy at proximal tibia. Distraction was started 7–14 days later. At the end of distraction phase, fixator was removed and transported segment was fixed with screws with or without bone grafting at docking site. Patients were followed up every 6 weeks for radiological and clinical assessment. Functional assessment using Application for the Study and Application of the Method of Ilizarov (ASAMI) functional score, and Musculoskeletal Tumour Society (MSTS) functional score while bone outcome was assessed with ASAMI bone score. Quality of regenerate was assessed by Fernandez-Esteve grading. Detailed scoring was done at the time of index surgery, at the time of LRS removal and at the time of consolidation phase. ResultsAll the 10 patients were male with mean age of 33 years. The mean defect size was 4.94 cm after debridement. Minimum duration of follow up was 30 weeks after removal of LRS. Mean duration between trauma and inclusion in the study was 17.7 months. The median external fixator index was 15.63 days/cm. The complication rate was 1.3/patient. According to Paley's classification, there were eleven problems and two obstacles, and no true complications. Both ASAMI bone score and functional scores were excellent in three and good in six patients. The median MSTS composite score was 76.66%. ConclusionThe integrated fixation is an effective and satisfactory method enabling early external fixator removal with low rate of complication. So, this technique can be recommended for the management of segmental tibial defects. Level of evidenceII.

A Retrospective Study of the Functional Outcomes in Patients with Proximal Humeral Bone Defect after Shoulder Fusion or Prosthetic Replacement.

The reconstruction of proximal humeral defects resulting from tumor resection is challenging. The purpose of this work was to retrospectively study the functional outcomes in patients with large bone defects after the resection of proximal humeral tumors. We performed a retrospective analysis of 49 patients with malignant or aggressive benign tumors in the proximal humerus at our institution between 2010 and 2021. Forty-nine patients were included in the study (prosthetic replacement, n = 27; shoulder arthrodesis, n = 22). The mean follow-up was 52.8 months (range, 14-129 months). The factors evaluated included the Musculoskeletal Tumor Society (MSTS) functional score, Constant Murley Score (CMS), and complications. Of the 49 patients enrolled in the study, 35 were disease-free by the time of the latest follow-up, and 14 died because of the disease. Adjuvant therapies and medical comorbidities were similar between the two groups. Osteosarcoma was the most common abnormality among all the patients. The mean MSTS scores for surviving patients in the prosthesis and arthrodesis groups were 57.4% and 80.9%, respectively. The mean CMS score for the surviving patients in the prosthesis group was 43.47, and it was 61.44 for arthrodesis cases. Patients with shoulder arthrodesis demonstrated evidence of bony union at a mean of 4.5 months. Shoulder arthrodesis is a reliable reconstructive procedure in patients with large bone defects after the resection of proximal humeral tumors for pediatric osteosarcoma patients. Moreover, prosthetic replacement with anatomical implants results in poor function in older metastasis patients with large bone defects and resection of the deltoid muscle.

Microwave in situ inactivation in the treatment of bone giant cell tumor: a mid-term descriptive study.

To evaluate the mid-term clinical efficacy of microwave in situ inactivation combined with bone grafting or polymethyl methacrylate (PMMA) filling in the treatment of giant cell tumor of bone (GCTB). This is a retrospective, descriptive, and analytical study. A total of 30 GCTB patients received microwave in situ inactivation from January 2012 to January 2020, whose clinical recurrence rate was evaluated at the last follow-up after microwave in situ inactivation surgery. The Musculoskeletal Tumor Society (MSTS) function score was used to evaluate the postoperative clinical panoramic results. All patients were followed up for 21 to 110months, with an average of 63.79months. Distal femur (40%) and proximal tibia (28%) had a higher rate of GCTB incidence. Seventeen percent of tumor patients suffered from associated pathologic fracture. The rate of Campanacci classification stage III was 60%. The average MSTS score was evaluated as 27.53 points overall at the last follow-up. In terms of complications, three, two, two and one cases developed fat liquefaction, controllable tissue rejection reaction, incision infection and degenerative changes around lesion joint, respectively, without in situ recurrences and reoperation as well as distant lung metastasis. The method of microwave in situ inactivation combined with bone grafting or PMMA filling is prudently recommended as one of the options for the limb salvage treatment of giant cell tumor of long and periarticular bone. IV: case series.

O-arm-guided percutaneous microwave ablation and cementoplasty for the treatment of pelvic acetabulum bone metastasis

ObjectiveThis study aims to evaluate the indications, safety, and efficacy of microwave ablation combined with cementoplasty under O-arm navigation for the treatment of painful pelvic bone metastasis.MethodsWe retrospectively collected data from 25 patients with acetabulum bone metastasis who underwent microwave ablation combined with cementoplasty. All patients underwent percutaneous microwave ablation combined with cementoplasty under O-arm navigation. The postoperative follow-up included evaluations of pain, quality of life, function, the incidence of bone cement leakage, and the presence of perioperative complications. Pain and quality of life were evaluated using the visual analog scale (VAS) and the QLQ-BM22 quality of life questionnaire for patients with bone metastases, respectively. The functional scores were calculated using the MSTS93 scoring system of the Bone and Soft Tissue Oncology Society.ResultsThere were 10 males and 15 females with an average age of 52.5 ± 6.5 years, all 25 patients received percutaneous procedures, and no technical failure occurred. Major complications, including pulmonary embolism, vascular or nervous injury, hip joint cement leakage, and infection, were not observed in the current study. Pain regression was achieved in 24 of 25 patients. The mean VAS scores significantly decreased to 3.4 ± 1.0, 2.5 ± 1.2, and 1.2 ± 0.6 points at 1 week, 1 month, and 3 months after the procedure, respectively, compared with 7.0 points before the procedure (P < .05). The mean QLQ-BM22 score significantly decreased to 36.2 ± 4.9, 30 ± 5.6, and 25.4 ± 2.3 points at 1 week, 1 month, and 3 months after the procedure, respectively, compared with 55.8 points before the procedure (P < .05). The preoperative Musculoskeletal tumour society (MSTS) functional score of 25 patients was 18.5 ± 5.3 points, and MSTS score was 20.0 ± 3.0, 21.4 ± 4.9, and 22.8 ± 2.3 at 1 week, 1 month, and 3 months after the procedure, respectively (P < .05). The average bone cement injection volume was 8.8 ± 4.6 ml.ConclusionThe use of O-arm-guided percutaneous microwave ablation combined with cementoplasty for the treatment of pelvic metastases could quickly and significantly alleviate local pain, prevent pathological fracture, and improve the quality of life of patients with reduced complications.

Periacetabular Tumour Resection under Anterosuperior Iliac Spine Allows Better Alloprosthetic Reconstruction than Above: Bone Contact Matters.

Background: Periacetabular resections are more affected by late complications than other pelvic resections. Reconstruction using bone allograft is considered a suitable solution. However, it is still not clear how the bone-allograft contact surface impacts on mechanical and functional outcome. Materials and methods: This paper presents the results of a retrospective analysis of 33 patients with resection of the entire acetabulum and reconstruction with an allograft-prosthetic composite for the period 1999 to 2010. Patients were divided in two groups, based on type of resection. In Group 1. patients had resections under anterosuperior iliac spine allowing the highest bone-allograft surface contact in reconstruction, while in Group 2 patients had resections over it. Results: Mechanical survival of the implant and Musculoskeletal Tumor Society functional score were calculated. Impact of age and artificial ligament were investigated as well. Patients in Group 1 had 38% mechanical failure rate of the implant while patients in Group 2 had 88%. Average functional score was higher in Group 1 compared with patients in Group 2. An artificial ligament was shown to have non-significant impact on survival of the reconstruction in Group 1, while significantly improving survival of reconstruction in Group 2. Conclusion: Bone-allograft contact matters: resection under anterosuperior iliac spine allows better mechanical survival and offers better reconstruction functional scores.

Comparison of Reconstruction Techniques Following Sacroiliac Tumor Resection: A Systematic Review.

Although internal hemipelvectomies with sacroiliac resections are not traditionally reconstructed, surgeons are increasingly pursuing pelvic ring reconstruction to theoretically improve stability, function, and early ambulation. This study aims to systematically compare complications and functional and oncologic outcomes of sacroiliac resection with and without reconstruction. PubMed and MEDLINE were queried for studies published between January 1990 and October 2020 pertaining to sacroiliac neoplasm resection with subsequent reconstruction. Patient demographics, histopathologic diagnoses, reconstruction techniques, Musculoskeletal Tumor Society (MSTS) functional scores, and oncologic outcomes were pooled. Twenty-three studies (201 patients) were included for analysis. Reconstruction was performed in 79.1% of patients, most commonly with nonvascularized autografts (45.8%). The overall complication rate was54.8%; however, resection followed by reconstruction demonstrated significantly higher complication (62.3% versus 25.7%, p < 0.001) and infection rates (13.7% versus 0%, p = 0.020). Mean MSTS functional score trended higher in nonreconstructed patients (82% versus 71.6%). Reconstruction after sacroiliac resection produced higher complication rates and poorer physical recovery when compared with nonreconstructed resection. This systematic review suggests that patients without spinopelvic junction instability may experience superior outcomes without reconstruction. Ultimately, the need to reconstruct the pelvic girdle depends on tumor size, prognosis, and functional goals.

A novel limb-salvage reconstruction strategy with a custom hemipelvic endoprosthesis and preserved femoral head following the resection of periacetabular tumors: A preliminary study.

The treatment of periacetabular malignancy frequently challenges surgeons. To simplify the surgical procedure, we performed a novel reconstruction strategy preserving the femoral head for patients with periacetabular malignancies. We retrospectively reviewed 14 patients who underwent total en bloc resection of a periacetabular tumor and reconstruction of the hip joint with an individualized hemipelvic endoprosthesis and remaining femoral head from July 2015 to January 2019 at our center. Regions of pelvic resection: region II-4 (28.6%), region I + II-5 (35.7%), region II + III-2 (14.3%) and region I + II + III-3 (21.4%). The oncological outcomes were that 13 patients survived without disease and one patient survived with lung metastasis. None of the patients experienced local recurrence (range: 20-62 months; mean: 32 months). The incidence of postoperative complications was 35.7%, including delayed wound healing and deep venous thrombosis. No prosthesis-related complications occurred until the last follow-up in this study (range: 20-62 months; mean: 32 months). The mean Musculoskeletal Tumor Society functional outcome score was 23.2. The mean Toronto Extremity Salvage Score of the patients was 75.7 points, with a mean limb discrepancy of 1.51 cm (range: 0.5-3.2 cm). Reconstruction with preservation of the femoral head showed acceptable early functional and oncological outcomes, and it had an acceptable complication rate.

Intercalary tibial reconstruction with frozen tumor-bearing autograft in combination with ipsilateral fibula in limb-salvage surgery

The purpose of this study was to examine whether the results of a reconstruction using frozen autograft in combination with vascularized fibula are comparable to other reconstructive methods in limb-salvage surgery for tibial sarcoma with regard to the functional outcome and complications. Between 2008 and 2012, nine patients with bone sarcoma of the tibia underwent excision of the affected segment that was then frozen and reimplanted with an ipsilateral vascularized fibular graft within it. Patients were examined clinically and radiographically. The mean follow-up was 48.8 months. The mean time to full weight-bearing was 6.2 months and to complete radiological union 6.8 months at the conjunction. One patient required a mid-thigh amputation due to local recurrence in soft tissue. No local recurrence arising from the frozen autograft was detected. Complications included wound dehiscence in 1, clawed toes in 1, temporary peroneal nerve palsy in 1, and stress fracture in 1. The average musculoskeletal tumor society functional score was 94.5%. Combination of a frozen tumor-bearing autograft and ipsilateral pedicled fibula is an effective reconstruction for massive bone defect arising from resection of bone sarcoma in tibia. This approach has the advantage of combining the biological properties offered by the vascularized bone graft with the mechanical endurance of the frozen autograft. The method is best indicated for intercalary defects of the tibia for selected patients. Level IV, therapeutic study.

Personalized 3D-printed guide in malignant bone tumor resection and following reconstruction – 17 cases in pelvic and extremities

IntroductionCustomized accurate tumor resection and individualized reconstruction is a challenging in treatment of malignant bone tumor. Three-dimensional (3D)-printing technique is now widely used in the resection and following reconstruction of malignant bone tumor, which included but not limited to tumor model, osteotomy guide and customized implant. MethodsWe retrospectively reviewed 17 patients, who underwent limb salvage surgery by using 3D-printed guide at a single center between August 2014 and October 2019. The median duration of follow-up was 26.5 months. Osteosarcoma (41.2%) were the predominant diagnoses. The functional outcomes were assessed by Musculoskeletal Tumor Society (MSTS) functional score. We also analyzed survival status, intraoperative data (blood loss, operation time and resection length), reconstruction method, margin outcomes and complications. ResultsWe totally performed 93 guided osteotomies on affected bone and allograft bone in 17 patients. Reconstruction in 12 cases was performed with biological technique: allograft combined with autograft was used in 7 cases. 11 of 12 (91.7%) cases showed a good bone healing in both allograft and autograft. 1 of 12 (8.3%) cases had allograft necrosis. Additional intra-operative extracorporeal radiation was performed in 3 pelvic cases for reconstruction. 63 of 64 (98%) osteotomies achieved wide resection and negative margin. All the cases had successful limb salvage result without amputation. At the latest follow up, the mean MSTS Score was 24 (range: 13–30), 12 patients alive with no evidence of disease, 1 patient alive with disease, 5 patients had died of disease and 5 years overall survival is 73.3%. The most common complications are wound healing disorder in 4 cases (23.5%) and infection in 3 cases (17.6%). ConclusionThe 3D-printed resection guide was easy to use and showed promise in the field of orthopedic oncology. It can not only used in primary malignant bone tumor personalized resection but also in shaping structural bone allograft in biological reconstruction, which can achieve a safety surgical margin and individualized resection at the same time.

A New Simple and Practical Clinical Classification for Tenosynovial Giant Cell Tumors of the Knee.

ObjectiveTo propose a simple and practical clinical classification for tenosynovial giant cell tumor (TGCT) of the knee.MethodsA retrospective study was conducted to verify the value and significance of this clinical classification. TGCT growth patterns, knee joint capsule, and bone erosion were applied to establish this novel clinical classification. Seventy‐eight patients who underwent surgery for TGCT from 2008 to 2016 were identified. This novel clinical classification was retrospectively applied to patients' existing classification, and patients with different TGCT types were statistically compared to verify the significance of the clinical classification.ResultsThe clinical classification included three types and four subtypes. Type 1: localized TGCT, Subtype 1a: localized intra‐articular TGCT, Subtype 1b: localized extra‐articular TGCT. Type 2: diffuse TGCT, Subtype 2a: diffuse intra‐articular TGCT with bone normal, Subtype 2b: diffuse intra‐articular TGCT with bone destruction. Type 3: diffuse TGCT across the knee joint capsule. The mean follow‐up time for the 78 patients was 59.6 months. Twenty‐one patients were in Subtype 1a, four were Subtype 1b, 38 were Subtype 2a, seven were Subtype 2b, and eight were Type 3. Oncological results and surgical complications differed significantly (P = 0.000, P = 0.000). The mean Musculoskeletal Tumor Society functional scores differed significantly at 27.8 for Type 1 patients, 22.9 for Type 2 patients, and 17.0 for Type 3 patients (P = 0.000).ConclusionsThis clinical classification can be easily used to evaluate TGCT of all knees prior to surgery or other treatments and can help determine surgical options.

Lower Limb Reconstruction Using Tibial Strut Autograft after Resection of Primary Malignant Bone Tumors in Skeletally Immature Patients.

Reconstruction of large bone defects in skeletally immature patients remains a surgical challenge. We report the long-term clinical outcomes of a novel surgical technique for lower limb reconstruction using the tibia as a strut autograft following resection of primary malignant bone tumors in skeletally immature patients. We retrospectively reviewed the medical records of six patients diagnosed with lower limb primary bone sarcoma. All patients underwent tumor resection and reconstruction using tibial strut autograft. The radiological and clinical outcomes including complications at the recipient and donor sites were assessed. The mean age at presentation was ten years (range 6-15 years). Two cases had osteosarcoma and four had Ewing sarcoma. The mean length of the resected tumor and tibial autografts were 20.83 and 19.33 cm respectively. Union at both ends was achieved in five grafts while one graft achieved union only at the distal end. The mean time for union of the proximal and distal junctions was 4 and 8.8 months respectively. The mean follow-up period was 8.4 years (range 14 months-20 years). One patient developed a foot drop, and three patients underwent subsequent joint arthrodesis (2 knees and 1 ankle). The mean musculoskeletal tumor society functional score was 80.8%. Two patients had clinically significant leg-length discrepancy that needs further lengthening procedure. Four patients survived with no evidence of disease and two patients died due to their primary oncologic disease. All donor sites regenerated, with the earliest signs of new bone formation at (2-4) weeks post-operatively. Reconstruction using non-vascularized‎ tibia strut autograft after resection of primary malignant lower limb bone tumors can be a viable alternative method for reconstructing large bone defects in the immature skeleton.

Is bipolar hemiarthroplasty an appropriate type of hip articulation following proximal femoral or total femoral resections for musculoskeletal malignancies?

Different approaches are applied for reconstruction in patients with a musculoskeletal malignancy which require a proximal femoral or total femoral resection. We aimed to evaluate the treatment outcomes of patients who underwent a proximal femoral or total femoral resection due to bone and soft tissue tumors and had an endoprosthetic reconstruction by a bipolar hemiarthroplasty type of hip articulation. We retrospectively identified 133 patients who underwent a proximal femoral or total femoral endoprosthetic replacement after resection of a bone or soft tissue malignancy. There were 74 male and 59 female patients, with a mean age of 55.02 ± 16.92years (range 11-84years) and a median follow-up of 24.47 ± 24.45months (range 6-164months). Patient demographics, surgical, and oncological data were recorded. Acetabular wear was measured using the classification proposed by Baker. Functional assessment was performed using the Musculoskeletal Tumor Society (MSTS) functional score. There was no statistically significant difference among primary diagnostic groups in terms of gender, prosthesis type, trochanter major resection, local recurrence, complication/revision rate, and MSTS Score (p > 0.05, for each parameter). On the other hand, a statistically significant difference was detected in terms of degree of acetabular erosion among diagnostic groups (p < 0.001); the acetabular erosion rate (AER) was found to be lower in patients with metastatic carcinoma than in patients with a diagnosis of primary bone or soft tissue sarcoma. The univariable analysis revealed that the effect of age, primary diagnosis, localization, follow-up time, and presence and number of distant organ metastasis variables on AER were found to be statistically significant (p = 0.018, p = 0.035, p = 0.002, p = 0.007, p = 0.031, p = 0.040, respectively). In patients who undergo a proximal femoral or a total femoral resection due to a musculoskeletal tumor, bipolar hemiarthroplasty is an adequate type of hip articulation method, since it does not affect the revision requirements and functional outcomes of patients with acetabular erosion.

Intercalary reconstruction following resection of diaphyseal bone tumors: A systematic review

IntroductionThe options for the reconstruction of diaphyseal defects following the resection of bone tumors include biological or prosthetic implants. The purpose of our study was to evaluate different types of intercalary reconstruction techniques, including massive bone allograft, extracorporeal devitalized autograft, vascularized free fibula, and modular prosthesis. MethodsWe performed a systematic review of articles using the terms diaphyseal bone tumor and intercalary reconstruction. All the studies reporting the non-oncological complications such as infection, nonunion and fracture of the intercalary reconstructions were included. We excluded articles published before 2000 or did not involve humans in the study. Case reports, reviews, technique notes and opinion articles were also excluded based on the abstracts. Thirty-three articles included in this review were then studied to evaluate failure rates, complications and functional outcome of different surgical intercalary reconstruction techniques. ResultsNonunion rates of allograft ranged 6%–43%, while aseptic loosening rates of modular prosthesis ranged 0%–33%. Nonunion rates of allograft alone and allograft with a vascularized fibula graft ranged 6%–43% and 0%–33%, respectively. Fracture rates of allograft alone and allograft with a vascularized fibula graft ranged 7%–45% and 0%–44%, respectively. Infection rates of allograft alone and allograft with a vascularized fibula graft ranged 0%–28% and 0%–17%, respectively. All of the allograft (range: 67%–92%), extracorporeal devitalized autograft including irradiation (87%), autoclaving (70%), pasteurization (88%), low-heat (90%) or freezing with liquid nitrogen (90%), and modular prosthesis (range: 77%–93%) had similar Musculoskeletal Tumor Society functional scores. Addition of a vascularized fibula graft to allograft did not affect functional outcome [allograft with a vascularized fibula graft (range: 86%–94%) vs. allograft alone (range: 67%–92%)]. ConclusionAseptic loosening rates of modular prosthesis seem to be less than nonunion rates of allograft. Adding a vascularized fibula graft to allograft seems to increase bone union rate and reduce the risk of fractures and infections, though a vascularized fibula graft needs longer surgical time and has the disadvantage of donor site morbidity. These various intercalary reconstruction techniques with or without a vascularized fibula autograft had similar functional outcome.

The impact of pathological fractures on surgery, morbidity, functional and oncological outcomes in patients with primary bone sarcomas

Background Although rare, pathological fractures may occur in primary bone sarcomas. There have been studies reporting that such patients have a poorer prognosis than those without a pathological fracture. This study investigates the impact of pathological fractures on surgery, morbidity, functional and oncological outcomes in patients with primary bone sarcomas.Patients and methods A retrospective analysis of 568 patients with primary bone sarcomas, treated between 2005 and 2019, was performed. The study included 41 patients with a pathological fracture and 51 control patients who did not have a pathological fracture. A multivariate Cox regression analysis was used to investigate the impact of pathological fractures and further independent variables on amount of intraoperative bleeding, duration of surgery, number of muscles and major neurovascular structures included in resection, tumor volume, surgical volume, Musculoskeletal Tumor Society (MSTS) functional score, postoperative complication rate, and local recurrence, distant metastasis, and survival rates.Results There were 36 (39%) female and 56 (61%) male patients. No statistically significant difference was noted in tumor volume, tumor/surgical volume percentage, number of major neurovascular structures included in resection, postoperative complication rate, and local recurrence, distant metastasis, and survival rates between the two groups (p > 0.05). A significantly higher amount of intraoperative bleeding and number of transfused blood components, a longer duration of surgery, and a higher amount surgical volume and number of resected muscles were detected in Group 1 compared to Group 2 (p=0.001, p=0.002, p=0.007, p=0.007, p < 0.001, respectively). The MSTS functional scores were lower in patients with a pathological fracture than in those without a pathological fracture (p=0.001).Conclusion We conclude that a pathological fracture through a primary bone sarcoma has no adverse effect on prognostic factors such as local recurrence, distant metastasis, and survival. However, pathological fractures increase the amount of intraoperative bleeding and surgical volume and result in a longer surgery, in addition to decreased functional outcomes.

The Efficacy of Radiofrequency Ablation for Bone Tumors Unsuitable for Radical Excision.

BackgroundBone tumors can cause severe pain and poor quality of life due to recurrence and non-achievement of complete remission after surgery, chemotherapy, or radiotherapy. Radiofrequency ablation (RFA) can be considered for minimally invasive treatment of bone tumors that are difficult to radically excise. In this study, RFA was performed for bone tumors that were difficult to radically excise and did not respond to surgery, chemotherapy, or radiotherapy due to their large sizes and/or locations. The purpose of this study was to retrospectively analyze the clinical characteristics and survival rates of bone tumors after RFA and provide one more treatment option for the future.MethodsThere were 43 patients with bone tumors who underwent percutaneous RFA at our hospital from April 2007 to October 2017. The median age of the patients was 59 years (range, 31–75 years), and the median follow-up duration was 67.2 months (range, 10.2–130.5 months). Of the 43 patients, 26 were male and 17 were female. Thirty-four cases were metastatic bone tumors, 5 were chordomas, 3 were osteosarcomas, and 1 was a giant cell tumor. Pain and functional ability of the patients were evaluated using a visual analog scale (VAS) and the Musculoskeletal Tumor Society (MSTS) functional scoring system, respectively. Scores were recorded preoperatively, 1 week postoperatively, and 4 weeks postoperatively. The 1-year, 2-year, and 5-year survival rates were evaluated using the Kaplan-Meier method.ResultsThe mean VAS score was 8.21 preoperatively. The mean VAS score at 1 week, 4 weeks, 12 weeks, and 24 weeks postoperatively were 3.91, 3.67, 3.31, and 3.12, respectively. The mean preoperative MSTS score was 64.0% (range, 32%–87%). The mean postoperative MSTS score was 71.0% (range, 40%–90%). The 1-year, 2-year, and 5-year survival rates were 95.3%, 69.8%, and 30.2%, respectively.ConclusionsAs per our study findings, RFA was effective in reducing pain and improving functional ability of patients with bone tumors that were difficult to radically excise.