Pelvic Chondrosarcoma Research Articles

Cancer Radiomic and Perfusion Imaging Automated Framework: Validation on Musculoskeletal Tumors.

Limitations from commercial software applications prevent the implementation of a robust and cost-efficient high-throughput cancer imaging radiomic feature extraction and perfusion analysis workflow. This study aimed to develop and validate a cancer research computational solution using open-source software for vendor- and sequence-neutral high-throughput image processing and feature extraction. The Cancer Radiomic and Perfusion Imaging (CARPI) automated framework is a Python-based software application that is vendor- and sequence-neutral. CARPI uses contour files generated using an application of the user's choice and performs automated radiomic feature extraction and perfusion analysis. This workflow solution was validated using two clinical data sets, one consisted of 40 pelvic chondrosarcomas and 42 sacral chordomas with a total of 82 patients, and a second data set consisted of 26 patients with undifferentiated pleomorphic sarcoma (UPS) imaged at multiple points during presurgical treatment. Three hundred sixteen volumetric contour files were processed using CARPI. The application automatically extracted 107 radiomic features from multiple magnetic resonance imaging sequences and seven semiquantitative perfusion parameters from time-intensity curves. Statistically significant differences (P < .00047) were found in 18 of 107 radiomic features in chordoma versus chondrosarcoma, including six first-order and 12 high-order features. In UPS postradiation, the apparent diffusion coefficient mean increased 41% in good responders (P = .0017), while firstorder_10Percentile (P = .0312) was statistically significant between good and partial/nonresponders. The CARPI processing of two clinical validation data sets confirmed the software application's ability to differentiate between different types of tumors and help predict patient response to treatment on the basis of radiomic features. Benchmark comparison with five similar open-source solutions demonstrated the advantages of CARPI in the automated perfusion feature extraction, relational database generation, and graphic report export features, although lacking a user-friendly graphical user interface and predictive model building.

Does primary tumor resection improve survival for patients with sarcomas of pelvic bones, sacrum, and coccyx who have metastasis at diagnosis ?

Recent studies demonstrated that primary tumor resection (PTR) improves survival of patients with metastatic bone sarcomas. However, it remains quite unclear regarding the role of PTR in the treatment of sarcomas of pelvic bones with synchronous metastasis at diagnosis. Using the Surveillance, Epidemiology, and End Results Program, we enrolled a total of 385 patients with sarcomas of pelvic bones, sacrum, and coccyx who have metastasis at initial diagnosis, including 139 patients with osteosarcoma, 176 with Ewing sarcoma, and 70 with chondrosarcoma. Association between PTR and disease-specific survival (DSS) were investigated using the univariable and multivariable Cox regression models. Hazard ratio (HR) and 95% confidence interval (CI) were reported. Representative institutional PTR strategies and clinical outcomes for patients with metastatic pelvic sarcomas from our cancer center were displayed. The usage rate of PTR was 28.1% (39/139) in osteosarcoma, 13.6% (24/176) in Ewing sarcoma, and 41.4% (29/70) in chondrosarcoma with synchronous metastatic lesions. PTR was not associated with an improved DSS for metastatic pelvic osteosarcoma (HR = 0.686, 95% CI = 0.430 ~ 1.094, P = 0.113) and Ewing sarcoma (HR = 0.580, 95% CI = 0.291 ~ 1.154, P = 0.121). The use of PTR was associated with an improved DSS for metastatic pelvic chondrosarcoma (HR = 0.464, 95% CI = 0.225 ~ 0.954, P = 0.037). Primary lesion resection may provide a survival benefit for metastatic chondrosarcoma, but not for osteosarcoma and Ewing sarcoma of pelvic bones, sacrum, and coccyx. This population-based study recommends an active surgical intervention for metastatic chondrosarcoma while non-surgical treatment for metastatic osteosarcoma and Ewing sarcoma of the pelvis in terms of survival improvement.

Outcomes and Complications of Pelvic Chondrosarcomas Treated Using Navigation Guidance and Multidisciplinary Approach: Is the Tumor Volume a Prognostic Factor?

(1) Background: Pelvic Chondrosarcomas (CS) have a poor prognosis. The grade is the most important survival predictor; other factors are periacetabular location and Dedifferentiated CS subtype. The aim of the study is to investigate a series of CS of the pelvis, to analyze the prognostic factors that affect outcomes and to demonstrate how the use of intraoperative navigation can reduce the complications without worse outcomes. (2) Methods: Retrospective study on 35 patients (21 M, 14 F), median age at surgery 54 years (IQR 41−65), with pelvic CS, treated with hemipelvectomy under navigation guidance. (3) Results: 30 high-grade CS and 5 low-grade CS; mean follow-up 51.4 months. There was a positive linear correlation between the tumor volume and the presence of local recurrence at follow-up. The mean survival time of patients with larger chondrosarcoma volume was lower, but not significantly so. Lower MSTS score was associated with significantly lower survival time (p < 0.001). (4) Conclusion: in this series overall survival, LR and distant metastasis were comparable with recent literature, while complication rate was lower compared to similar series without the use of navigation. There was a correlation between tumor volume and local recurrence rate but not with the presence of metastasis at follow up.

What's New in Musculoskeletal Tumor Surgery.

What's New in Musculoskeletal Tumor Surgery.

“In-house” Design and Use of 3-dimensional Printed Patient-specific Bone Tumor Resection Guides for Geometric Osteotomies in Sarcoma Surgery

Three-dimensional printing technology has rapidly advanced as a promising technology for preoperative planning, education, and surgical execution in orthopedic surgery. Use of patient-specific instrumentation in orthopedic oncology sarcoma cases can streamline complex osteotomies while providing safe margins based on predetermined osteotomy levels. We describe use of an “in-house” protocol to create patient-specific bone tumor resection guides for use in orthopedic oncology cases. The described protocol bypasses expensive outsourcing options and facilitates use of preoperative surgical simulation and intimate involvement of the surgical team in the guide design. We report on the successful design and use of three-dimensional printed patient-specific bone tissue resection guides in a case of proximal tibial parosteal osteosarcoma resection and reconstruction with a size-matched allograft, and in a case of a secondary pelvic chondrosarcoma resection.

Presenting features and overall survival of chondrosarcoma of the pelvis

IntroductionChondrosarcoma is the second most common sarcoma of bone. This sarcoma is generally unresponsive to chemotherapy and radiation and is primarily managed through surgical excision. Pelvic chondrosarcoma presents a distinct therapeutic challenge due the complexity of resection, frequent recurrence and metastasis, and high post-operative morbidity. MethodsThe SEER database was queried for pelvic chondrosarcoma diagnosed between 2004 and 2015. Cases were described by age, sex, tumor size, extension, grade, metastasis, and therapeutic intervention. These same variables were assessed for the upper extremities, lower extremities, skull and facial bones, thoracic bones, and vertebral column. ResultsIn total, 472 cases of pelvic chondrosarcoma were identified, representing 18.4% out of 2571 cases of chondrosarcoma distributed throughout the skeletal system. Among pelvic cases, 288 were male and 184 were female, with a median age of diagnosis of 54. Median tumor size was 96 mm, 64.9% of tumors were considered extracompartmental, and 11.3% of tumors were metastatic at time of diagnosis. The 2, 5, and 10-year survival rates for all cases of primary chondrosarcoma of the pelvis are 76.7%, 61.8%, and 52.2%, respectively. Survival was worse for patients with metastasis, male sex, age >60, tumor size >8 cm, dedifferentiated histology, and no surgical resection. On multivariate assessment high grade and metastasis most significantly predicted worse overall survival. ConclusionPelvic chondrosarcoma commonly presents with high-risk features including larger tumor size, extracompartmental extension, and metastatic disease at diagnosis, predicting worse overall survival compared to non-pelvic tumors, and were the least amenable to surgical resection.

A case report of large left iliac wing chondrosarcoma with diaphyseal aclasis

Chondrosarcoma is a primary malignant bone tumour that is derived from the cartilage cells. Pelvis is a common site of involvement. Osteochondroma is a common benign bone tumour and shows a bony outgrowth that grows away from the adjacent joint. Hereditary multiple exostosis/diaphyseal aclasia is an autosomal dominant condition characterised by multiple osteochondromas. Neoplastic transformation of the diaphyseal aclasis is rare and only a few cases of pelvic chondrosarcoma with diaphyseal aclasis (hereditary exostosis) have been reported in the literature. In this case report, we describe a case report of a 32-yr-old female; who had diaphyseal aclasia presented with pain and a lump in the pelvis adjacent to the left iliac region. On the basis of imaging; a provisional diagnosis of pelvic chondrosarcoma was given. The patient then had surgery and on histopathology well-differentiated chondrosarcoma was established

The programme of comprehensive rehabilitation after LUMIC post-resection with the reconstruction of a proximal part of femur with MUTARS system resulting from the treatment of pelvis chondrosarcoma.

Abstract &#x0D; Introduction: Malignant neoplasms of bone originating from the supporting tissues of the body of mesinchymal origin are heterogeneous in clinical and histological terms. In most cases, the etiology of these tumors is unknown. Histologically, sarcomas are classified into three main types. Chondrosarcoma (31% of sarcomas), osteosarcoma - originating from bone tissue (also accounts for 31% of sarcomas), Ewing sarcoma - originating from neuroectodermal tissue (accounts for 14% of sarcomas). The aim of this study was to present a program of comprehensive rehabilitation after LUMIC resection arthroplasty with reconstruction of the proximal part of the femur using the Mutars system as a result of pelvic chondrosarcoma treatment.&#x0D; Materials and methods: The paper describes a case of a patient diagnosed with left pelvic chondrosarcoma with a pathological fracture and destruction of the left hip joint.&#x0D; Results: In the rehabilitation program, both inpatient and outpatient, many methods of therapy have been used in order to restore the patient to the highest possible fitness as quickly as possible. The therapy was based on such exercises and methods as: PNF method, methods of visceral therapy, active exercises and methods of osteopathy.&#x0D; Conclusion: Rehabilitation is an indispensable element of the treatment of cancer patients. The introduction of modern techniques, such as manual therapy and osteopathy to rehabilitation, has a positive effect on the effectiveness of therapy.

Clear Cell Chondrosarcoma-Oncological Outcomes in an Asian Cohort.

Clear cell chondrosarcoma is a rare subtype of chondrosarcoma, included in the category of low-grade (grade 1) sarcomas of the bone. We evaluated the results of treatment of these rare tumours at our institute and documented their outcomes in a hitherto unreported ethnic (Asian) cohort. Of the 480 extremity and pelvic chondrosarcomas diagnosed between January 2006 and December 2017 at our institute, 12 (2.5%) were clear cell chondrosarcoma. There were 11 male patients and one female patient. The mean age was 35years (range 24-51years). Mean duration of symptoms was 6months and all cases were in the long bones; 8 cases in the femur, 2 in the humerus, and 1 each in the tibia and fibula. All cases were non metastatic at presentation Three patients were excluded from final analysis as they did not seek treatment at our hospital after initial presentation. Seven of nine cases had elevated alkaline phosphatase levels (mean value of 342 and range of 94-1353). Eight cases underwent wide excision while one case who had curettage elsewhere and presented to us with no evidence of residual disease was managed with watchful observation. None of the patients received adjuvant chemotherapy or radiotherapy. There were no local or distant recurrences at a median follow-up of 73months (range 43-244months). Seven of nine cases had elevated alkaline phosphatase levels (mean value of 342 and range of 94-1353). Eight patients were alive and disease free at last follow-up while one had died due to an unrelated cause at 76months after index surgery. Clear cell chondrosarcomas comprised only 2.5% (12 of 480) of all chondrosarcomas in our study. Elevated serum alkaline phosphatase levels may serve as a surrogate marker to help in diagnosis. Wide excision in clear cell chondrosarcomas is recommended and provides excellent oncological outcomes.

Is 2 mm a wide margin in high-grade conventional chondrosarcomas of the pelvis?

Controversy exists as to what should be considered a safe resection margin to minimize local recurrence in high-grade pelvic chondrosarcomas (CS). The aim of this study is to quantify what is a safe margin of resection for high-grade CS of the pelvis. We retrospectively identified 105 non-metastatic patients with high-grade pelvic CS of bone who underwent surgery (limb salvage/amputations) between 2000 and 2018. There were 82 (78%) male and 23 (22%) female patients with a mean age of 55 years (26 to 84). The majority of the patients underwent limb salvage surgery (n = 82; 78%) compared to 23 (22%) who had amputation. In total, 66 (64%) patients were grade 2 CS compared to 38 (36%) grade 3 CS. All patients were assessed for stage, pelvic anatomical classification, type of resection and reconstruction, margin status, local recurrence, distant recurrence, and overall survival. Surgical margins were stratified into millimetres: < 1 mm; > 1 mm but < 2 mm; and > 2 mm. The disease--specific survival (DSS) at five years was 69% (95% confidence interval (CI) 56% to 81%) and 51% (95% CI 31% to 70%) for grade 2 and 3 CS, respectively (p = 0.092). The local recurrence-free survival (LRFS) at five years was 59% (95% CI 45% to 72%) for grade 2 CS and 42% (95% CI 21% to 63%) for grade 3 CS (p = 0.318). A margin of more than 2 mm was a significant predictor of increased LRFS (p = 0.001). There was a tendency, but without statistical significance, for a > 2 mm margin to be a predictor of improved DSS. Local recurrence (LR) was a highly significant predictor of DSS, analyzed in a competing risk model (p = 0.001). Obtaining wide margins in the pelvis remains challenging for high-grade pelvic CS. On the basis of our study, we conclude that it is necessary to achieve at least a 2 mm margin for optimal oncological outcomes in patients with high-grade CS of the pelvis. Cite this article: Bone Joint J2021;103-B(6):1150-1154.

Clinical Statistical Analysis with Comparison between Pelvic and Non-pelvic Chondrosarcoma.

ObjectivesChondrosarcomas are rare tumors with a variable biological characteristic. Their treatment clinically and surgically is controversial. Analysis of the clinical statistics and prognostic factors of pelvic chondrosarcoma provides a reference for clinical diagnosis and treatment.MethodsA total of 73 cases of chondrosarcoma were collected, including 24 pelvic samples, from 2008 to 2017 from the hospital database and divided into two groups: pelvic chondrosarcoma and non-pelvic chondrosarcoma. The clinical characteristics and prognostic factors of pelvic chondrosarcoma were analyzed using different statistical methods.ResultsAmong the 24 pelvic chondrosarcoma patients, the ratio of male to female was 1.4:1, and the median age was 43.5 years. According to the classification proposed by Enneking, there were five grade I, 14 grade II, and five grade III. Histological grading of chondrosarcoma was grade I in one case, II in 15 cases, and III in eight cases. The histological type was 17 conventional, three dedifferentiated, two secondary, one myxoid, and one mesenchymal. The overall survival rates for 24 cases at three, five, and 10 years were 82.2±8.1%, 77.3±8.9%, and 52.4±12.1%, respectively. The local recurrence rate of pelvic chondrosarcoma after surgical resection (83.3%) was significantly higher than that of other sites (34.7%), and the difference was statistically significant (p < 0.001). The final proportion of amputation rate (50.0%) was also higher than other parts (20.4%), with a statistically significant difference (p = 0.010). The total survival of the two groups was not significantly different (p = 0.216).ConclusionsChondrosarcoma of bone generally has an excellent prognosis when optimally diagnosed and treated by an experienced team of specialists. Pelvic chondrosarcoma has a higher local recurrence rate than the other sites and tends to result in amputation. Early local recurrence after surgery indicates a poor prognosis.

A Competing Risk-based Prognostic Model to Predict Cancer-specific Death of Patients with Spinal and Pelvic Chondrosarcoma.

Retrospective analysis. The aim of this study was to develop and validate a competing-risk-based prognostic model and a nomogram for predicting the three- and five-year probability of cancer-specific death (CSD) in patients with spinal and pelvic chondrosarcoma. The issue of competing risk has rarely been addressed and discussed in survival analysis of bone sarcoma. In addition, the Fine and Gray model, a more accurate method for survival analysis in the context of competing risk, has also been less reported in prognostic study of chondrosarcoma. A total of 623 patients with spinal or pelvic chondrosarcoma were identified from the SEER database and were divided into a training and a validation cohort. These two cohorts were used to develop and validate a prognostic model to predict the 3- and 5-year probability of CSD, considering non-CSD as competing risk. The C-index, calibration plot, and decision curve analysis were used to assess the predictive performance and clinical utility of the model. Older age (subdistribution hazards ratio [SHR]: 1.02, 95% confidence interval [CI]: 1.01∼1.03; P = 0.013), high grade (SHR: 2.68, 95% CI: 1.80∼3.99; P < 0.001), regional involvement (SHR: 1.66, 95% CI: 1.06∼2.58; P = 0.026), distant metastasis (SHR: 5.18, 95% CI: 3.11∼8.62; P < 0.001) and radical resection (SHR: 0.38, 95% CI: 0.24∼0.60; P < 0.001) were significantly associated with the incidence of CSD. These factors were used to build a competing-risk-based model and a nomogram to predict CSD. The C-index, calibration plot, and decision curve analysis indicated that the nomogram performs well in predicting CSD and is suitable for clinical use. A competing-risk based prognostic model is developed to predict the probability of CSD of patients with spinal and pelvic chondrosarcoma. This nomogram performs well and is suitable for clinical use.Level of Evidence: 4.

Pelvic Chondrosarcoma Treated by En Bloc Resection with Patient-Specific Osteotomy Guides and Reimplantation of the Extracorporeally Irradiated Bone as an Osseocartilaginous Structural Orthotopic Autograft: A Report of Two Cases with Description of the Surgical Technique

Primary tumors of the pelvis are considered difficult to treat due to the complex anatomy and the proximity of important neurovascular structures. The surgical armamentarium for the treatment of these tumors has evolved with the help of cutting-edge technology from debilitating hemipelvectomies to solutions such as precise resections guided by patient-specific instruments or computer navigation and reconstruction by modular prostheses, 3D-printed custom-made implants, or orthotopic autograft reimplantation after extracorporeal irradiation. Different combinations of these techniques have been described in the literature with various rates of success. We present two cases of pelvic chondrosarcomas successfully treated by a combination of periacetabular resection with patient-specific osteotomy guides and orthotopic reimplantation of the extracorporeally irradiated autograft resulting in retention of the native hip.

Mesane Tutulumlu Pelvik Kondrosarkom

Chondrosarcoma is the second most common malignant tumor of bone. The treatment of chondrosarcoma is surgical resection. Most of the time, they are not sensitive to chemotherapy and radiotherapy. Pelvic sarcomas have a worse prognosis than those in long bones. Treatment of pelvic chondrosarcoma is challenging because of the tumor's proximity to major vessels and organs. We present the case of a 43-year-old man with advanced pelvic chondrosarcoma filling the entire pelvis and invading the bladder who was treated with hemipelvectomy, radical cystoprostatectomy and ileal loop urinary diversion. In such well chosen, non-metastatic, young chondrosarcoma patients, multidisciplinary surgical approaches can provide survival benefits.

Differences in clinical characteristics and tumor prognosis between primary and secondary conventional pelvic chondrosarcoma

BackgroundChondrosarcoma (CS) most commonly involves the pelvis. This study aimed to analyze differences in clinical characteristics and prognostic factors between primary and secondary conventional pelvic CS, and provide reference for clinical diagnosis and treatment.MethodsEighty patients (54 primary cases and 26 secondary cases) with pelvic CS were included in this retrospective study. The tumor site, Enneking stage, soft tissue mass, margin, initial tumor grade, incidence of local recurrence and distant metastasis were evaluated. Kaplan-Meier method was used to calculate the overall survival rate. X2 test and log-rank test were used for univariate analysis, and Cox test was used in multivariate analysis.ResultsThe average age of patients with secondary CS was significantly younger than that of patients with primary CS (P < 0.001). The soft tissue mass of patients with secondary CS was significantly larger than that of patients with primary CS (P = 0.002). There was a significant difference in initial tumor pathologic grade between the two groups (P = 0.002). No statistically significant difference was observed in the local recurrence rate between the two groups. The median recurrence time of patients with primary CS after the first treatment was significantly shorter than that of patients with secondary CS (P < 0.001). The overall survival rate of patients with secondary CS was much higher than that of patients with primary CS (P = 0.003). Cox regression analysis showed that the initial tumor grade was an independent factor in the overall survival rate of patients with CS.ConclusionThere were significant differences in age, soft tissue mass, initial tumor grade, and overall survival rate between the two groups. The overall survival rate of pelvic CS was related to the initial tumor grade of CS.

Chondrosarcoma pelvis, beyond the boundaries.

Objectives: The objective of our study to find the outcome of extensive chondrosarcoma pelvis after surgery. Study Design: Case Series study. Setting: Department of Orthopaedic Surgery Dow University of Health Sciences / Civil Hospital Karachi. Period: From April 2014 to December 2018. Material &amp; Methods: Seven patients with Chondrosarcoma pelvis included in this study. Results: All Seven patients were male. 2 patient age was in 20’s, three in 40’s and two in 60’s with median age of 44. Clinically presentation of patients was variable. One patient present with groin lump, one with pain and swelling lower abdomen, three with hip pain, one patient with severe gluteal pain and lump, one with massive lump extending from the mid abdomen to groin and urine retention and constipation. Five patients have left pelvis involved and two have right side. Two patients have pubic bone and ischium (Level III) involved, two have ilium (Level I) and three have ilium, acetabulum and pubis (Level I, II, III). Two patients with have preoperatively sciatic nerve palsy. Two patients have medical comorbid. One was asthmatic and one had psychiatric illness. No patient had metastasis at presentation. Pubis and ischium with tumor resected in two cases, partial ilium resection in one case, one complete P1 resection with sciatic nerve, one patient have internal hemipelvectomy and one patient had internal hemipelvectomy that bone recycled in liquid nitrogen and pelvis re-implanted and fixed with recon plates and hip joint reconstructed with total hip replacement. One patient had external hemipelvectomy due to pus at tumor site. Total duration of surgery in patient having thirteen hours, and remaining have 3 to 5 hours. Blood loss during these surgeries was in between 1000 to 1200 ml. Three patients have wound infection, one patient had L5 nerve root injury. Patient with external hemipelvectomy develop wound dehiscence and uro-cutaneous fistula. Two patients died, one with recycled bone after 15 months due cardiac problem and 2nd due to disease related complications within 3 months of surgery. Conclusion: Pelvic chondrosarcoma must be operated by the team of surgeons including orthopaedic surgeon, urologist and general surgeon because of the tumor presents with massive lumps due to unrestricted compartment and can involve the important pelvic organ. With team any complication can be prevented and treated immediately.

Navigation-assisted pelvic resections and reconstructions for periacetabular chondrosarcomas

ObjectivesSurvival in patients with chondrosarcomas has not improved over 40 years. Although emerging evidence has documented the efficacy of navigation-assisted surgery, the prognostic significance in chondrosarcomas remains unknown. We aimed to assess the clinical benefit of navigation-assisted surgery for pelvic chondrosarcomas involving the peri-acetabulum. MethodsWe studied 50 patients who underwent limb-sparing surgery for periacetabular chondrosarcomas performed with navigation (n = 13) without it (n = 37) at a referral musculoskeletal oncology centre between 2000 and 2015. ResultsThe intralesional resection rates in the navigated and non-navigated groups were 8% (n = 1) and 19% (n = 7), respectively; all bone resection margins were clear in the navigated group. The 5-year cumulative incidence of local recurrence was 23% and 56% in the navigated and non-navigated groups, respectively (p = 0.035). There were no intra-operative complications related to use of navigation. There was a trend toward better functional outcomes in the navigated group (mean MSTS score, 67%) than the non-navigated group (mean MSTS score, 60%; p = 0.412). At a mean follow-up of 63 months, the 5-year disease-specific survival was 76% and 53% in the navigated and non-navigated group, respectively (p = 0.085), whilst the 5-year progression-free survival was 62% and 28% in the navigated and non-navigated group, respectively (p = 0.032). ConclusionThis study confirmed improved local control and progression-free survival with the use of computer navigation in patients with limb-salvage surgery for periacetabular chondrosarcomas, although the advancement in other treatment modalities is required for improvement of disease-specific survival.

Analysis of pelvic and non-pelvic chondrosarcoma postoperative recurrence risk factors in 65 cases among 3 ethnic groups (Han, Uyghur, and other nationalities)

Background: Chondrosarcomas are a rare tumor that has a variable biological characteristic, also their treatment clinically and surgically is controversial. So, authors are analyzing the related risk factors of influencing the postoperative recurrence of chondrosarcoma. Methods: Retrospective analysis of clinical data, a total of 65 cases of chondrosarcoma were collected from January 2002 to June 2016 in our hospital database and divided into 2 groups (pelvic and non-pelvic chondrosarcoma) with 3 ethnic class (Han, Uyghur, and other nationalities) of Chinese people. The clinical characteristics and prognostic risk factors of chondrosarcoma recurrence were analyzed by different statistic methods. Results: The age, sex, nationality, surgical method, pathological grade and Enneking stage of chondrosarcoma patients were not significantly correlated with postoperative recurrence (P&gt;.05); but the site of tumor growth was significantly correlated with postoperative recurrence (P&lt;0.001). Cox regression model multivariate analysis showed that tumor growth site was an independent factor influencing postoperative recurrence of chondrosarcoma, and the risk of postoperative recurrence of pelvic chondrosarcoma was 3.610 times higher than non-pelvic chondrosarcoma. Conclusion: The recurrence rate of pelvic chondrosarcoma was significantly higher than non-pelvic chondrosarcoma.

Palliative embolization arteries or veins for a recurrent pelvic chondrosarcoma

Palliative embolization arteries or veins for a recurrent pelvic chondrosarcoma

Advancing patient age is associated with worse outcomes in low‐ and intermediate‐grade primary chondrosarcoma of the pelvis

Conventional primary pelvic chondrosarcoma often presents as a low- or intermediate-grade tumor in older patients. Although this is the most common variant of pelvic chondrosarcoma, studies examining treatment outcomes are lacking. The purpose of this study was to evaluate patients with these tumors to determine their outcomes of treatment. Seventy-three patients (grade I [n = 19, 26%] and grade II [n = 54, 74%]) were reviewed including 55 (75%) males and 18 (25%) females, with a mean age of 51 (range, 17-81) years and follow-up of 9 ± 5 years. The 10-year disease-specific survival was 71%. Grade II disease (hazard ratio [HR], 6.74; P = .04) and age ≥50 years (HR, 3.97; P = .02) was associated with death due to disease. The 10-year local recurrence- and metastatic-free survival were 79% and 72%. Of the patients with a local recurrence (n = 11), 7 (64%) recurred at a higher histological grade. Patient age ≥50 years was associated with local recurrence (HR, 10.03; P = .02) and metastatic disease (HR, 4.20; P = .02). Advancing patient age was an independent risk factor for worse survival and disease recurrence. Tumors often recurred locally at a higher grade and as such wide local excision remains the treatment of choice for these tumors.