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Hip involvement is one of the most common skeletal manifestations of hereditary multiple exostoses (HME) in 30-90% of the patients. The anatomical changes in the proximal femur in patients with HME, may lead to deformities and related functional deficits. Its effect on the range of motion (ROM) of the hip joint is not well described. The aim of this study was to evaluate the role of hip deformity of HME disease in the ROM of the hip joint. It was hypothesized that certain morphological parameters affect the ROM of the hip joint. Conclusively, 44 patients including 27 men and 17 women (88 hips) were evaluated. Hips are divided in Group 1 (no ROM limitation group) and Group 2 (ROM limitation group). The head-neck ratio (HNR), center edge angle (CE), Sharp's acetabular angle (SAA), alpha angle (AA), neck shaft angle (NSA) and ROM parameters were measured. The correlations between radiological parameters (SAA, CE, NSA, AA and HNR), and the ROM data (F, E, Abd, Add, IR and ER) were statistically evaluated. All evaluated parameters (SAA, CE, NSA, AA) except the HNR do not show significant differences between study group 1 (no ROM limitation group) and group 2 (ROM limitation group). The means of the HNR in group 1 were significantly higher than those in group 2 (HNR: 1.23 vs. 0.92, p<0.001). In group 2 HNR showed a strong positive correlation with Abd (PC 0.72, p<0.001), E (PC 0.7, p<0.001), ER (PC 0.67, p<0.001), IR (PC 0.67, p<0.001) and F (PC 0.66, p<0.001). HME patients with hip involvement have better ROM of the hip joint, if they have the higher HNR. Additionally, a positive correlation between HNR and ROM capacity was determined. [ABSTRACT FROM AUTHOR]

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Unicameral bone cysts (UBC) are reported to be the underlying lesion in 40% of pathological femoral neck fractures in skeletally immature patients. They are typically asymptomatic and incidentally found on imaging. However, when symptomatic, it commonly may present with pathologic fracture that causes pain, swelling, or deformity. The purpose of this study was to assess the natural history of the pediatric proximal femoral unicameral bone cyst, risk factors for pathological fracture and recurrence. Medical records were retrospectively reviewed of patients with pediatric proximal femoral UBC’s who underwent surgery between 2004 and 2018. We included 51 consecutive patients with pediatric proximal femoral UBC (36 impending fractures/15 pathological fractures). The patients were evaluated regarding the localization of the UBC and the activity of the cyst. The cyst parameters were measured, and the patients were further assessed regarding the presence of pathological fracture and applied treatment. The pathological fracture group was compared to the impending fracture group using radiological cyst parameters, management options, healing, recurrences, and other related complications. The most commonly affected localizations were combined involvement of femoral neck and intertrochanteric (n=21) The number of latent lesions was 27 and active lesions were 24. The mean cyst index in our series was 3.8±1.2 (1.2-7.2). The cyst index in our series was correlated with pathological fractures. (p=0.048) There were significantly higher cyst index values in recurrent cases. (p=0.016) The cyst extension below the trochanter minor level was found as a risk factor for pathological fractures. (p=0.021) The most common treatment in our series was curettage, graft packing, and plate fixation with 27 patients. The treatment method showed no correlation with consolidation or recurrence rate. According to the healing criteria for UBC’s at final follow-up, 36 cysts were completely consolidated, 13 were evaluated as incomplete healing and two were persistent. The recurrence rate was significantly high in UBC’s who were operated on at <10 years of age (p=0.006). Accordingly, the active lesions were also significantly related to earlier recurrence (p=0.03). Although younger age, active cysts, and higher cyst index are shown as risk factors for recurrence, not for fracture in proximal femoral UBC’s. However, with age, the cyst relatively migrates to the weight-bearing intertrochanteric area, which may inevitably impose a major risk for pathological fractures. Ensuring stability with a plate even in impending fractures of the proximal femur may aid early mobilization and faster recovery. [ABSTRACT FROM AUTHOR]

Background: Minimally invasive percutaneous plate osteosynthesis (MIPO) and intramedullary nailing (IMN) are the two most commonly used methods for distal tibial extra-articular fractures; however, the ideal treatment is still on debate. The aim of this study was to compare MIPO and IMN in the treatment of distal tibial extra-articular fractures in terms of cost analysis according to health insurance records in Turkey., Methods: The data of patients who underwent either MIPO or IMN for the treatment of distal tibial extra-articular fractures between 2013 and 2018 were analyzed in this retrospective study. Patients' clinical data, as well as the overall expenses from the first admission until return to work including hospitalization, and all outpatient controls had been reviewed from the hospital's billing department. The total amount of money paid per month by Turkish National Social Security Institution to the patient until the patient's returns to work were also recorded., Results: 118 consecutive patients (35 female-83 male) with the mean age of 37.2±13.4 were participated to the study. IMN group consisted of 57 patients with a mean age of 36.7±12.8 years, and MIPO group consisted of 61 patients with a mean age of 37.8±13.6 years. No significant differences were observed between study groups in terms patients' age, gender, fracture classification (AO/OTA: Arbeitsgemeinschaft für Osteosynthesefragen/Orthopedic Trauma Association), soft-tissue injury (Tscherne classification), presence of type 1 open fracture, and presence of accompanying fibula fracture. There was no statistical difference between two groups in terms of pre-operative hospital stay (p=0.713). However, the mean length of hospital stay was significantly higher in the MIPO group (p=<0.001). The means of number of total outpatient controls, time to union, and return to work were also significantly higher in the MIPO group (p=0.005, p<0.001 and p<0.001, respectively). The mean hospital cost until discharge and the mean total cost until return to work were significantly higher in the MIPO group (p=0.001 and 0.001, respectively). The mean total costs of hospital stay and outpatient controls were also significantly higher in the MIPO group (p=0.001 and 0.004, respectively). The mean implant costs did not significantly differ between groups (p=0.179)., Conclusion: According to the results acquired from the present study, IMN is a better option compared to MIPO for the treatment of extra-articular distal tibial fractures in terms of costs paid by the national health insurance in Turkey.

Objectives: This study aims to present our experience in the management of fractured femoral stems after primary and revision hip replacements by evaluating the clinical and radiographic characteristics and determining the effectiveness of the extraction methods., Patients and Methods: A total of 15 patients (5 males, 10 females; mean age 65.9 years; range, 49 to 87 years) who underwent revision hip replacement due to a fractured femoral stem between January 2005 and December 2019 were included in this retrospective study. The mechanisms and risk factors for failure as well as methods applied to extract fractured stem were analyzed through clinical and radiographic data., Results: Nine patients had fractured cemented femoral stems, while six patients had fractured fully porous coated cementless revision stems. Lack of proximal buttress in distally fixed femoral stems was detected in 11 patients and identified as the predominant mechanism resulting in fracture. The proximal extraction method with conventional revision instrumentation, the cortical window technique, and extended trochanteric osteotomy (ETO) were used in three, seven, and five cases, respectively., Conclusion: Our results demonstrated that the lack of proximal buttress is the most common reason for femoral stem fracture. Moreover, the proximal extraction method was mostly ineffective in fully porous femoral stems. A step-by-step approach should be considered for the extraction of a broken stem. The cortical window method can be considered as the second step if proximal extraction methods fail, and ETO should be considered at the last step if all techniques fail.

Bizarre parosteal osteochondromatous proliferation (BPOP, also known as Nora's lesion) is a rare, benign, locally aggressive condition defined as osteochondromatous exostosis arising from the bony cortex. BPOP presents predominantly in the 2nd and 3rd decades of life, and commonly arises from the periosteum of metacarpals and metatarses, though rare locations have been reported, including the long bones, the maxillae, the bones of calvaria, and the sesamoids. The case of an osteochondromatous lesion in an infant with an intra-abdominal mass arising from the iliac wing, an atypical location of benign solitary lesions, is reported. Benign solitary lesions are exceptional in this age group. The parents of the patient, who was born in term at 3600 grams, discovered a mass in the left groin and observed decreased movement in the lower left extremity. No history of trauma was reported. When the patient was 5 months of age, AP pelvic X-ray, computed tomography, and magnetic resonance imaging revealed a bony mass displacing intra-abdominal organs anteromedially. Biopsy reported an osteocartilaginous lesion with calcified mature cartilaginous fragments surrounded by plasmacytoid, monotone, fibrinoid cells in myxoid background. Differential diagnosis included osteochondroma, osteochondromyxoma, BPOP, fibrocartilaginous mesenchymoma, chondromyxoid fibroma, periosteal chondroma, soft tissue chondroma, myositis ossificans, and juxtacortical chondroma. Biopsy of the resected specimen determined a diagnosis of BPOP. At 6-month postoperative follow-up, neither symptoms nor complaints related to the mass were present.

Unicameral bone cysts (UBC) and aneurysmal bone cysts (ABC) are benign cystic lesions of bone which are easily diagnosed. However, unusual locations may lead to a false diagnosis. Therefore the aim of this retrospective study was to determine the frequency of unusual localizations. The authors studied 451 cases with histopathologically confirmed diagnosis of UBC or ABC, seen between 1981 and 2012. In the UBC group (352 cases) humerus, femur and calcaneus were found to be the most common sites, while acetabulum, scapula, scaphoid, lunatum, metacarpals, metatarsals, toe phalanges and ulna each accounted for less than 1%. In the ABC group (99 cases) the most common sites of involvement were femur, humerus and tibia, while finger phalanges, ilium, acetabulum, pubis, calcaneus, cuboid, and toe phalanges each accounted for only 1%. The differential diagnosis of cystic bone lesions should include both UBC and ABC. Pain complaints plead for the latter, except in case of fracture.