Pubic Tubercle Research Articles

Xanthogranulomatous osteomyelitis of pubic bone mimicking neoplasm: a case report and literature review

BackgroundXanthogranulomatous osteomyelitis (XO) is a rare disease characterized radiologically by an osteolytic lesion with cortical expansion or disruption. Differentiating this condition from other osteolytic diseases such as primary or metastatic bone neoplasms is imperative. Several case reports have been published on XO, with previous reports predominantly identifying bacteria such as Pseudomonas or Staphylococcus as causative organisms. However, fungal infection-induced XO has not yet been reported.Case presentationWe present the case of a 23-year-old woman with a tumor-like osteolytic lesion in the pubic bone. The patient had experienced pelvic pain and intermittent febrile episodes for 2 months. Plain radiography revealed an osteolytic lesion in the right pubic tubercle. Magnetic resonance imaging suggested a cystic bone tumor or tubercular infection. Surgical intervention included curettage of the lesion and irrigation with normal saline. Histopathological examination of the specimen revealed abundant foamy histiocytes with inflammatory infiltrates consistent with XO. Culture of the osteolytic lesion confirmed an Aspergillus species infection and antifungal treatment was initiated. At 1-year follow-up, no evidence of local recurrence was observed.ConclusionsAlthough rare, XO requires differentiation from similar conditions and is treated with surgical intervention and targeted medical therapy based on the identified organisms. Clinicians should be mindful that XO can also be induced by fungal infections and that combination antifungal treatments may be beneficial in such cases.

A Unique Positioning of Saphenofemoral Junction: A Case Report and Literature Review

Introduction The saphenofemoral junction (SFJ) serves as a proximal link joining the superficial and deep veins in the lower limbs. Its anatomical position is typically 2.5 cm inferior and 4 cm lateral to the pubic tubercle. This study reports an exceptional case wherein the SFJ was found in the lower thigh. Case presentation A 24-year-old male presented with left leg pain and swelling for five years duration. Clinically, the left lower limb showed noticeable varicose veins. The duplex ultrasound showed several enlarged varicose veins, primarily around the knee. However, the SFJ was observed roughly 15 cm below the pubic tubercle, with a reflux lasting more than four seconds. The patient declined all therapy modalities, and regrettably, he was lost to further follow-up. Literature review No prior reports were found in the literature describing such an abnormal positioning of the SFJ approximately 15 cm below the pubic tubercle. Conclusion In conclusion, while the lower limb veins have various anatomical variations, locating the SFJ in the mid-third of the thigh is rare and has not been documented in the literature.

Lite-YOLOv8: a more lightweight algorithm for Tubercle Bacilli detection.

Deep learning is a transformative force in the medical field and it has made significant progress as a pivotal alternative to conventional manual testing methods. Detection of Tubercle Bacilli in sputum samples is faced with the problems of complex backgrounds, tiny and numerous objects, and human observation over a long time not only causes eye fatigue, but also greatly increases the error rate of subjective judgement. To solve these problems, we optimize YOLOv8s model and propose a new detection algorithm, Lite-YOLOv8. Firstly, the Lite-C2f module is used to ensure accuracy by significantly reducing the number of parameters. Secondly, a lightweight down-sampling module is introduced to reduce the common feature information loss. Finally, the NWD loss is utilized to mitigate the impact of small object positional bias on the IoU. On the public Tubercle Bacilli datasets, the mean average precision of 86.3% was achieved, with an improvement of 2.2%, 1.5%, and 2.8% over the baseline model (YOLOv8s) in terms of mAP0.5, precision, and recall, respectively. In addition, the parameters reduced from 11.2 to 5.1 M, and the number of GFLOPs from 28.8 to 13.8. Our model is not only more lightweight, but also more accurate, thus it can be easily deployed on computing-poor medical devices to provide greater convenience to doctors.

A Gender-based Study on the Morphometry of Cotyloid Cavity of the Coxal Bone in South Indian Population

Abstract Background and Aim: The cotyloid cavity (acetabulum) is a cup-shaped hollow on the lateral aspect of the coxal bone. The head of the femur articulates with cotyloid cavity to form the hip joint. The cotyloid cavity varies in size, shape, and depth among individuals. Any deviation from the normal range of parameters of the acetabulum may result in arthrosis-related pathologies. Materials and Methods: The present study was conducted on 200 dry human hip bones. The bones were collected from the department of anatomy of a medical college in Mangalore. The following morphometrical parameters of the cotyloid cavity were measured: (a) transverse diameter of acetabulum, (b) acetabular height, (c) acetabular depth, (d) acetabular volume, (e) distance from the pubic tubercle to the anterior rim of the acetabulum, and (f) ratio between distance from the pubic tubercle to the anterior rim of the acetabulum and acetabular height. Range, mean, standard deviation, and standard error of mean were determined for each parameter. P value was also calculated. Gender-wise comparison of the results was done. Results: The independent t-test was done, and the P value was calculated for each parameter. All the parameters showed significant differences between the male and female hip bones. Conclusion: In this modern era, total and partial hip replacement surgeries are very commonly performed. Therefore, knowledge regarding the various morphometrical parameters of the cotyloid cavity may be of great help in the preoperative planning period. It would also be of great help in the fields of forensic anthropology, osteology, and anatomy.

Progress of anterior subcutaneous internal fixation in the treatment of anterior pelvic ring injury

Anterior subcutaneous internal fixation (INFIX) is one of the current representatives of minimally invasive fixation of injuries to the anterior pelvic ring. The nail insertion point of this technique is located at the anterior inferior iliac spinous screw, with an angle of 30° outward and 20° backward. Screw in at an angle, and note that the screw head should be above the deep fascia and maintain a safe distance of 20 to 25 mm from the bone surface. Its improved versions include 3 or 4 nails INFIX with added pubic tubercle screws, unilateral INFIX, short-rod INFIX, and double INFIX. These improvements further enhance stability. The lateral femoral cutaneous nerve (LFCN) is relatively easy to be damaged during anatomy, so special attention should be paid during the operation. Biomechanical stability has advantages over external fixation, and its application is flexible. It is not limited to pubic ramus fracture, symphyseal separation, etc. It also plays an important role in combined anterior and posterior ring fixation. It can be combined with posterior sacroiliac screws, iliac lumbar screws, etc. Fixed etc. Good clinical results have also been reported in children, pregnant women, and people with contraindications for subcutaneous connecting rods. In addition, the current application of robots, reduction frames and other technologies has greatly reduced the difficulty of reduction and improved the quality of closed reduction, making it possible to fix complex pelvic fracture. This technique has high reduction quality and is as effective as traditional steel plates. A common complication is LFCN injury. Careful exposure and adjustment of the position and depth of internal fixation during surgery can effectively avoid this complication.

Computerized surgical navigation resection of pelvic region simulated bone tumors using skin fiducial marker registration: an in vitro cadaveric study.

Computerized surgical navigation system guidance can improve bone tumor surgical resection accuracy. This study compared the 10-mm planned resection margin agreement between simulated pelvic-region bone tumors (SPBT) resected using either skin fiducial markers or Kirschner (K)-wires inserted directly into osseous landmarks with navigational system registration under direct observation. We hypothesized that skin fiducial markers would display similar resection margin accuracy. Six cadaveric pelvises had one SPBT implanted into each supra-acetabular region. At the left hemi-pelvis, the skin fiducial marker group had guidance from markers placed over the pubic tubercle, the anterior superior iliac spine, the central and more posterior iliac crest, and the greater trochanter (5 markers). At the right hemi-pelvis, the K-wire group had guidance from 1.4-mm-diameter wires inserted into the pubic tubercle, and3 inserted along the iliac crest (4K-wires). The senior author, a fellowship-trained surgeon performed "en bloc" SPBT resections. The primary investigator, blinded to group assignment, measured actual resection margins. Twenty of 22 resection margins (91%) in the skin fiducial marker group were within the Bland-Altman plot 95% confidence interval for actual-planned margin mean difference (mean = -0.23mm; 95% confidence intervals = 2.8mm, - 3.3mm). Twenty-one of 22 resection margins (95%) in the K-wire group were within the 95% confidence interval of actual-planned margin mean difference (mean = 0.26mm; 95% confidence intervals = 1.7mm, - 1.1mm). Pelvic bone tumor resection with navigational guidance from skin fiducial markers placed over osseous landmarks provided similar accuracy to K-wires inserted into osseous landmarks. Further in vitro studies with different SPBT dimensions/locations and clinical studies will better delineate use efficacy.

Obturator Nerve Block: An Anatomical Perspective.

Background A comprehensive understanding of the anatomy of the obturator nerve after its emergence from the obturator foramen is essential when undertaking an obturator nerve block effectively. This study was conducted to provide precise anatomical guidance of the obturator nerve block with surface landmarks in the inguinal region. Materials and methods A cross-sectional observational study was carried out on 34 dissected embalmed cadaveric lower limbs to investigate anatomic variability of obturator nerve localization concerning bony/ligamentous landmarks viz. the pubic tubercle, anterior superior iliac spine, inguinal ligament, and femoral artery as well as the adductor longus. Results The pubic tubercle and inguinal ligamentwere found to be the "least variable indicator" and palpable landmark for localization of the main trunk of the obturator nerve exhibiting lesser standard deviation of the mean distance from the obturator nerve exit. Among the soft tissue (vessel/muscle) parameters, the shortest distance of the adductor longus muscle from the obturator nerve exit was found to have the lowest standard deviation, thus making it the most reliable parameter for obturator nerve localization. Conclusion High anatomic variability in the obturator nerve's localization does exist, and this explains the difficulty frequently encountered in the application of regional anesthetic techniques. The pubic tubercle and inguinal ligament points were found to be the least variable and most reliable landmarks for localization of the main trunk of the obturator nerve.

(172) Managing Proximal Perforation of Inflatable Penile Prosthesis in Pelvic Trauma

Abstract Introduction Corporal perforation is a complication that occurs secondary to misdirected or over-aggressive dilation or weakened tunica albuginea. One major risk factor is corporal fibrosis, as the corpora is more difficult to dilate, and sharp dissection or counter-incisions may be required. Fibrosis is most commonly observed in patients with history of infection, priapism, Peyronie’s disease, or multiple revision surgeries. In the setting of pelvic trauma, normal anatomical landmarks can be altered leading to proximal perforation during dilation. Proximal corporal perforation first manifests as unequal corporal measurements intraoperatively or palpable malposition of the cylinder into the perineum. Objective Herein we discuss the case of a 24-year-old male with erectile dysfunction secondary to pelvic trauma who presents one year postoperatively with malposition of his right cylinder due to proximal migration from altered pelvic anatomy. We aim to describe our surgical techniques that can be utilized to correct proximal perforation. Methods Physical exam and preoperative imaging revealed grossly malpositioned right prosthetic cylinder. We utilized the prior transverse penoscrotal incision to deliver the scrotal pump from the surgical capsule. Given normal appearance of reservoir on imaging and duration from initial placement, only the scrotal pump and cylinders were exchanged. Bilateral cylinders were explanted through vertical corporotomies. Proximal measurements of 20cm on the left and 24cm on the right were consistent with corporal perforation. The Windsock procedure was performed by placing a 2–0 PDS suture from out to in through the tunica albuginea, through the right rear-tip extender, then in to out back through the albuginea of corporotomy. After copious irrigation of corporal space, new cylinders were placed using the modified rear tip extender. A new scrotal pump was placed in anterior dependent position. The device cycled properly in symmetric position bilaterally before all tissue layers were closed. Results The patient was observed overnight and discharged on post-operative day 1 after passing void trial. He was noted to be doing well at his post-operative clinic visit 6 weeks later and has been cleared for sexual activity. Conclusions We describe a patient with challenging anatomy due to extensive pelvic fracture leading to corporal perforation and proximal migration of a prosthetic cylinder. Due to lack of a normal pubic tubercle, we performed the Windsock sling procedure to provide posterior support of the right cylinder to prevent future proximal migration. An alternate approach is to secure the prosthesis tubing via sutures to the corporotomies is also presented. A critical intraoperative maneuver is evaluating for equal dilator depth alignment to recognize proximal perforation. These techniques can be applicable to other patients with altered anatomy secondary or in the setting of proximal corporal perforation. Disclosure Any of the authors act as a consultant, employee or shareholder of an industry for: Boston Scientific.

Pubic Tubercle Osteochondroma

Background: The commonest benign bone tumors, osteochondromas, which can be solitary or multiple involving the metaphyseal region of long bones, rarely present in the axial skeleton, such as pelvic girdle, which warrants surgical excision in case of symptoms arising out of pressure effects.
 Case Report: In this study, we are herewith reporting an unusual case of pubic tubercle osteochondroma, which is solitary and pedunculated in a 37-year-old woman. She has had the swelling for the past 15 years, which was asymptomatic except for mild hydroureteronephrosis, which was an incidental diagnosis; however, we managed the patient with surgical excision of the tumor with elaborate preoperative radiological imaging using both X-ray and computed tomography (CT) scan. Histopathological examination confirmed the diagnosis of osteochondroma.
 Conclusion: Asymptomatic pelvic osteochondroma should be considered in patients with incidental swelling in the groin region, especially women who may be reluctant to seek medical attention due to social stigma.

(194) Midline Reservoir Placement of Infrapubic Inflatable Penile Prosthesis: A Step-by-Step Surgical Technique

Abstract Introduction Various alternative placements of inflatable penile prosthesis (IPP) reservoirs have been previously documented, differing from the traditional retroperitoneal placement in the Space of Retzius. Pelvic trauma, history of surgery in the pelvic region, and atypical anatomy can necessitate an alternative location for implantation of the IPP reservoir. The midline placement of the IPP reservoir provides numerous advantages in outcomes, patient experience, and versatility of implantation. This video demonstrates the surgical procedure for midline placement of the IPP reservoir. Objective We outline a surgical technique to place the IPP reservoir in an alternative midline location. Methods The patient was instructed to void his bladder prior to the procedure to circumvent Foley catheter insertion. A 2.5 cm-wide horizontal incision was made 2 finger widths cranially to the dorsal aspect of the base of the penis. The surgeon’s index finger was used for blunt dissection along the linea alba above the pubic tubercles. A tonsil clamp is used to pierce the rectus fascia at the midline, below the arcuate line, to leave a defect just wide enough to accommodate a 70 mm nasal speculum. The surgeon’s finger is used to assess the space to determine if a 9/10 mm Hegar dilator is necessary to expand the avascular space by sweeping it parallel to the fascia. The speculum is inserted and positioned with the blades pointed cranially parallel to the facial axis and the handles pointed superiorly. The reservoir is prepared and delivered into this space using a metal pediatric Yankauer suction tip through the open blades of the nasal speculum. A syringe filled with saline solution is connected to the reservoir tubing, and the fluid is transferred completely to the reservoir and the tubing is clamped. The tubes originating from the reservoir and implant cylinders are both clamped, trimmed to length, and connected to each other in a watertight fashion to permit the bidirectional flow of saline solution. Proper IPP cylinder inflation is tested prior to closing the incision. Results The reservoir is thus safely deployed cranially to the pubic bone and avoids interfering with the urinary bladder. No complications were observed in this patient, and he was discharged on the same day. Conclusions The midline surgical placement of the reservoir during the infrapubic implantation of an inflatable penile prosthesis is a safe and effective alternative placement for patients with prior pelvic surgery, injuries, or atypical pelvic anatomy. Patients with compromised pelvic, abdominal, or inguinal regions due to hernia repair, patulous inguinal rings, or dense lateral pelvic scarring stand to benefit the most from this reservoir placement. This procedure outlines the surgical steps of midline reservoir placement for new IPP implantation or relocation during a revision procedure. Disclosure No.

Superficial Inferior Epigastric Artery Flap: Vascular Pattern and Territory Across the Midline.

Superficial inferior epigastric artery (SIEA) flap offers a significant advantage of lower donor site morbidity over other abdominal-based flaps for breast reconstruction. However, the inconsistent anatomy and territory across the midline remains a major issue. This study aimed to investigate the SIEA and determine its pattern and territory across the midline. Twenty cadavers were studied. Ipsilateral dye was injected to the dominant SIEA. Dissection was performed to evaluate the SIEA origin, artery and vein pattern, vessel diameter, and dye diffusion territory. Overall, three SIEA patterns were identified: bilateral presence (45%), ipsilateral presence (30%), and bilateral absence (25%). The territory depended on the vessel course and dominant SIEA diameter, not on its common origin from the femoral artery, at the pubic tubercle level. Regarding the midline territory (pubic tubercle level to umbilicus), SIEA (type 1a) with a diameter of ≥1.4 mm on either side supplied at least half the distance, whereas SIEA with a diameter of <1 mm was limited to the suprapubic area. Designing a SIEA flap island across the midline is feasible when contralateral SIEA is present to augment the contralateral territory (e.g., type 1a SIEA) or in SIEA with a common/superficial external pudendal artery origin. Preoperative imaging studies are important for confirming the SIEA system. When the diameter at the origin of the SIEA flap is larger than 1.4 mm, the blood supply to the ipsilateral and contralateral sides is sufficient to enable safe flap elevation.

Single port (SP) robotic pyeloplasty in a pediatric patient

We began using the da Vinci single port (SP) robot for pediatric urologic surgeries at our institution due to limited access to the multiport robot. Availability of this technology has allowed us to schedule cases in a timelier fashion and increase access to minimally invasive urologic surgery for children in our area. Here, we report our technique for transperitoneal SP robotic pyeloplasty in the case of a 7 year-old boy with left ureteropelvic junction obstruction. Our technique was refined over a series of 10 patients under the age of 18. Highlights of the SP RALP technique include one 3cm, concealed incision over the pubic tubercle, gentle frog leg positioning and burping of the boom to create optimal angle for robotic docking, and use of a "floating dock" to obtain 10cm distance from target anatomy which is essential in smaller pediatric patients. SP pyeloplasty is safe and feasible in children and offers a concealed single incision alternative to the multiport approach.

Morphometrical parameters of acetabulum of hip bone - An osteological study

Background: Acetabulum is an approximately hemispherical cavity on the lateral aspect of the hip bone. Acetabulum is not always of the same shape, size, or depth. Any deviations of the parameters from normal range have strong correlation with the development of various kinds of pathologies. Aims and Objectives: Acetabulum is an approximately hemispherical cavity on the lateral aspect of the hip bone. Acetabulum is not always of the same shape, size or depth. Any deviations of the parameters from normal range have strong correlation with the development of various kinds of pathologies. Materials and Methods: This study was conducted in department of Anatomy, Yenepoya Medical College, Mangalore. Two hundred hip bones were included in the study. Various parameters of the acetabulum were measured. The morphometrical parameters measured were: (a) Transverse diameter of acetabulum, (b) acetabular height, (c) acetabular depth, (d) acetabular volume, (e) distance from pubic tubercle to anterior rim of acetabulum, (f) ratio between distance from pubic tubercle to anterior rim of acetabulum and acetabular height. Range, mean, standard deviation, and standard error of mean were determined for each parameter. P value was also calculated to compare the parameters side wise. Results: The independent T test was done and the P value was calculated for each parameter. Acetabular volume showed a significant difference between left- and right-sided bones. Most of the parameters showed highly significant difference between male and female hip bones in both right side and left side. Conclusion: As total and partial hip replacements are common surgeries performed these days, knowledge of the dimensions of acetabulum will assist prosthetists to construct suitable prosthesis for Indian population. It would be also useful in the fields of anatomy, osteology, and anthropology.

Preoperative CT imaging as a tool to predict incisional hernia outcomes following abdominal wall reconstruction: A retrospective cohort analysis

Ventral wall hernia often causes significant morbidity and requires complex abdominal wall reconstruction (AWR). This study aims to determine whether subcutaneous abdominal fat thickness (AFT) measured with preoperative CT scans could predict postoperative outcomes in patients undergoing AWR. A retrospective cohort study was conducted on all patients who underwent AWR at our institution between 2009 and 2021, with a minimum follow-up of 12 months. Using preoperative CT scans, AFT was measured at the xiphoid process, umbilicus, and pubic tubercle, as well as the hernia dimensions. Demographic, operative, and surgical outcome data were also collected and analyzed using statistical tests. The results showed that 9 of 101 patients (8.9%) experienced hernia recurrence. Smoking was associated with an increased risk of hernia recurrence (p<0.001) with a predictive odds ratio (OR) of 18.27 (p=0.041). Increased AFT at the xiphoid (p=0.005), umbilicus (p<0.001), and pubic tubercle (p<0.001) were also associated with hernia recurrence and risk of infection. Only AFT at the pubic tubercle reached significance in the regression model predicting recurrence (OR=1.10; p=0.030) and infection (OR=1.04; p=0.021). A cut-off value of 67mm was associated with a positive predictive value of 42.14% (sensitivity of 67% and specificity of 91%). Hernia defect area was not associated with risk of recurrence or infection. Smoking and increased AFT at the pubic tubercle are significant predictive factors for recurrence and infection in patients undergoing AWR, and preoperative optimization should focus on reducing these factors.

A standard canulated screw may not fit up to 1/3 of the patients treated percutaneously for anterior column acetabular fractures—A pilot study

A proper evaluation of the narrowings and length of the anterior acetabular column would offer better predictability and precision for implant insertion in the case of an acetabular fracture. ObjectiveTo determine the diameter and length of the safety corridor of the anterior column of the acetabulum in patients with available pelvic computed tomography (CT), analyze the obtained measurements against those of a standard 6.5-mm implant, and verify possible sex differences regarding these measurements. A secondary aim was to develop a method for measurement of the anterior column of the acetabulum based on CT images. Materials and MethodsIn 200 CT scans of hemipelvises we measured the diameter of two areas of narrowing and the length of the safety corridor of the anterior column. The images were submitted to multiplanar reformatting adjusted to a plane orthogonal to the bone corridor, drawn at the level of the superior pubic ramus. ResultsMeasurement #1 had a mean value of 8.12 (2.27) mm in the overall sample and median values of 9.03 (7.76–10.48) mm in men and 6.77 (5.44–7.19) mm in women. Measurement #2 had a mean value of 7.29 (2.19) mm and median values of 8.23 (7.18–9.82) mm in men and 5.9 (4.65–7.19) mm in women. Measurement #3 had a mean value of 109.53 (13.66) mm in the overall sample and median values of 117.17 (112.9–122.9) mm in men and 100.91 (90.95–111.17) mm in women (p<0.001 all three measurements). Measurement #1 was smaller than 6.5 mm in 22.5% of the patients (of whom 90% were women). Measurement #2 was smaller than 6.5 mm in 35% of the patients (of whom 80% were women). ConclusionsThis study proposed an anatomic evaluation of the anterior column of the acetabulum using conventional CT images The areas of narrowing in the anterior column had an average of 8.12 mm at the level of the pubic tubercle and 7.29 mm at the level of the acetabular fossa. The mean length of the safety corridor was 109.53 mm. In 35% of the cases, a 6.5 mm percutaneous screw would have violated the cortical bone of the safety corridor.

313 Preoperative CT Imaging: A Tool to Predict Incisional Hernia Outcomes Following Abdominal Wall Reconstruction

Abstract Aim Abdominal wall reconstruction (AWR) is a surgical technique used to manage recurrent incisional hernias, which cause significant morbidity and are difficult to treat. In this study, we sought to determine whether subcutaneous abdominal fat thickness (AFT) measured at the xiphoid process, umbilicus, and pubic tubercle using preoperative CT scans could predict postoperative outcomes in patients undergoing AWR. Method A retrospective cohort study was conducted on all patients who underwent AWR at our institution between 2009 and 2021 with a minimum follow-up of 12 months. Using preoperative CT scans, AFT was measured at the xiphoid process, umbilicus, and pubic tubercle, as well as the hernia dimensions. Demographic, operative, and surgical outcome data were also collected and analysed using statistical tests. Results The results showed that 9 out of 101 patients (8.9%) experienced hernia recurrence. Smoking was significantly associated with an increased risk of hernia recurrence (p&amp;lt;0.001) and had a predictive odds ratio (OR) of 18.27 (p = 0.041). Increased AFT at the xiphoid (p = 0.005), umbilicus (p&amp;lt;0.001), and pubic tubercle (p&amp;lt;0.001) were also associated with hernia recurrence and additionally with risk of infection. However, only AFT at the pubic tubercle reached significance in the multivariate logistic regression model predicting recurrence (OR = 1.10; p = 0.030) and infection (OR = 1.04; p = 0.021). Conclusions In conclusion, smoking and increased subcutaneous abdominal fat thickness at the pubic tubercle are significant risk factors for recurrence and infection in patients undergoing abdominal wall reconstruction, and preoperative optimisation should focus on reducing these factors.

Paper 65: Novel CT-Derived 3D Modeling Assessing Dysplastic Hips Versus Controls Demonstrates Decreased 2D Lateral Center Edge Angle, but not Tönnis Angle, Predicts Decreased 3D Anterolateral Coverage

Paper 65: Novel CT-Derived 3D Modeling Assessing Dysplastic Hips Versus Controls Demonstrates Decreased 2D Lateral Center Edge Angle, but not Tönnis Angle, Predicts Decreased 3D Anterolateral Coverage

Evaluation of the effect of pelvis type in percutaneous acetabular column fixation: a computed tomography study.

This study aimed to evaluate the effect of pelvis type in percutaneous acetabular column fixation. What is the effect of pelvis type in percutaneous acetabular colon fixation? The available pelvic computed tomography (CT) scans which were obtained in the diagnostic imaging center with a 1 mm slice width were evaluated. The pelvic type was classified with the help of MPR (Multiplanar Reformat) and 3D (Three Dimensional) imaging modes. All evaluated bony pelvic structures were anatomically intact. 40 types of android, gynecoid, anthropoid, and platypelloid pelvis were determined. CT sections were created in MPR imaging mode. Anterior obturator oblique (AOO) and inlet images were created for anterior column evaluation, while iliac oblique (IO) and outlet images were created for posterior column evaluation. The possibility of obtaining a linear corridor for acetabular columns was investigated by measuring corridor width and lengthon images of pelvic CTs. A linear corridor could not be obtained between the pubic tubercle and the supraacetabular region of 12 (30%) CTs in the anterior column of gynecoid pelvis group. The diameter of the anterior column corridor was below 5.5 mm in 10 (25%) of Gynecoid pelvis group, 5 (12.5%) of Anthropoid pelvis group, and 10 of Platypelloid pelvis group, , and all those scans belonged to the female gender. There was a statistically significant difference between pelvis types in terms of anterior and posterior column diameters (p <0.001). While the android pelvis type had the highest diameter and corridor length in both anterior column and posterior column measurements, the gynecoid pelvic type had the lowest diameter and corridor length. In the evaluations made according to gender, both anterior and posterior column diameters were larger and longer in males than in females (p <0.001). Pelvis type is an important factor which can affect anterior and posterior column diameter and length of acetabulum. Pelvic typing before acetabular surgery can help the surgeon determining the most appropriate patient position, surgical approach, and implant selection. Level of Evidence: Level 2.

Novel Physical Examination Tests for the Diagnosis of Chronic Sacroiliac Joint Dysfunction and Differentiate It From Lumbar Disc Herniation

BACKGROUND: Traditional sacroiliac joint (SIJ) provocation tests have been used to diagnose SIJ pain. However, this can simply be changed to chronic SIJ dysfunction (cSIJD) manifests as mechanical changes in the pelvis and lower extremities in addition to pain. A novel composite of physical examinations based on the iliac pronation, pubic tubercle tenderness, and plantar fascia tenderness tests (IPP triple tests) was designed for the diagnosis of cSIJD. OBJECTIVES: To evaluate IPP triple tests in the diagnosis of cSIJD and differential diagnosis from lumbar disc herniation (LDH) in comparison with traditional provocation tests. STUDY DESIGN: Prospective single-blind controlled study. SETTING: This study was conducted at the Department of Spine and Spinal Cord Surgery of China Rehabilitation Research Center in Beijing, China. METHODS: One hundred and sixty-six patients were assigned into the cSIJD group, LDH group, or healthy control group. The cSIJD diagnosis was confirmed by SIJ injection. The diagnosis of LDH was confirmed according to the 2014 North American Spine Association diagnosis and treatment guidelines for LDH. All patients were examined with IPP triple tests and traditional provocation tests. The sensitivity, specificity, positive and negative likelihood ratios, and areas under the curve (AUCs) were used to evaluate the diagnostic accuracy of the composites or single of the IPP triple tests, and traditional provocation tests. The Delong’s test was used for the comparison among AUCs. The kappa analysis was used for the IPP triple tests and traditional provocation tests compared with the reference standard (REF). The independent t test and chi-square test were used to analyze the influence factors (i.e., age, gender), and group on diagnostic accuracy. RESULTS: There was no statistical difference in gender (chi-squared = 0.282, P = 0.596) and age (F = 0.096, P = 0.757) between the 3 groups. The AUC of the iliac pronation test was 0.903 when it was used alone; the AUC of the novel composites of the IPP triple tests was 0.868 (95% confidence interval [CI] = 0.802-0.919); and the diagnostic accuracy of the traditional provocation test was relatively low (AUC = 0.597, 95% CI = 0.512-0.678). The diagnostic accuracy of the IPP triple tests was higher than that of the traditional provocation test, P &lt; 0.05. Kappa consistency comparison showed that the kappa value between the IPP triple tests and the REF was 0.229, the kappa between the traditional provocation test and the REF was 0.052. The age of the patients with inaccurate diagnosis was higher than that of the patients with accurate diagnosis in both methods (traditional tests, P = 0.599; IPP:P = 0.553). Different types of diseases (groups) affect the accuracy of diagnosis, the proportion of inaccuracy of traditional provocation tests was higher than that of the IPP triple tests (77.8% vs 23.6%) in cSIJD, while the 2 methods have high differential diagnostic accuracy in LDH (96.77%) and control groups (97.56%). LIMITATIONS: Small size of LDH patients and differences in physical tests among examiners. CONCLUSIONS: The novel composites of IPP triple tests have higher accuracy than the traditional provocation tests in diagnosing cSIJD and both have good accuracy in differentiating cSIJD from LDH. IPP triple tests may be an alternative physical examination for clinical screening of cSIJD. KEY WORDS: Sacroiliac joint dysfunction, low back pain, lumbar disc herniation, provocation test, physical examination, kinematics

The AIUM Practice Parameter for the Performance of the Musculoskeletal Ultrasound Examination.

The AIUM Practice Parameter for the Performance of the Musculoskeletal Ultrasound Examination.