1/27. Multiple occurrence of osteochondromas in dysplasia epiphysealis hemimelica.Dysplasia epiphysealis hemimelica was defined by Trevor (1950) as a rare congenital growth disorder of the tarsus and of the epiphysis of the long bone. In this report, a rare case of dysplasia epiphysealis hemimelica associated with multiple extraskeletal osteochondromas is presented. Although different modes of expression of the same pathologic process have been suggested for dysplasia epiphysealis hemimelica and osteochondroma, the biological feature of cartilaginous overgrowth in the skeletal system still seems unclear.- - - - - - - - - - ranking = 1keywords = osteochondromas (Clic here for more details about this article) |
2/27. Pseudoaneurysm of the popliteal artery caused by exostosis of the femur: case report and review of the literature.A 13-year-old boy with a solitary exostosis of the left femur was seen with a pseudo-aneurysm of the popliteal artery. When left leg pain occurred 3 months earlier, radiographic examination revealed an exostosis with a cartilage cap. Serial radiographic examination demonstrated gradual disruption of the cartilage cap of the exostosis as the pseudoaneurysm developed. An exostosis with an irregular surface was found at surgery. A literature review disclosed 39 similar cases in which loss of the cartilage cap was considered as one of the causes of the aneurysm formation. Considering the clinical course of our patient, however, we believe that exostoses lose their cartilage caps by pressure destruction due to the aneurysms. It is highly probable that loss of the cartilage does not cause the aneurysms.- - - - - - - - - - ranking = 1.2296284192448keywords = exostosis (Clic here for more details about this article) |
3/27. Two cases of osteochondroma recurrence after surgical resection.Osteochondromas are the most common bone tumor found in children. A review of 114 resected osteochondromas over a 10-year period revealed recurrence in 2 cases. The overall recurrence rate of these lesions is less than 2% and was found to be 1.8% in this review.- - - - - - - - - - ranking = 0.2keywords = osteochondromas (Clic here for more details about this article) |
4/27. MR Imaging of sports-related pseudotumor in children: mid femoral diaphyseal periostitis at insertion site of adductor musculature.OBJECTIVE: The objective of this study was to review the imaging appearance of the femurs of five patients who had been referred from outside institutions after presenting with thigh pain and being given a preliminary diagnosis of primary malignant bone tumor. Typically, when making a diagnosis, physicians place emphasis on the characteristic appearances of diseases on MR imaging, but such appearances may be misleading. An awareness of the specific MR imaging pattern of stress-related partial muscle avulsion can lead to the correct diagnosis. CONCLUSION: Femoral diaphyseal periostitis after a sports injury to the adductor musculature in children has a characteristic imaging appearance. This condition can initially appear to be misleadingly aggressive. knowledge of the findings-particularly of the findings on MR imaging-in the proper clinical setting can help physicians make the correct diagnosis and eliminate unnecessary biopsy or inappropriate treatment.- - - - - - - - - - ranking = 0.082196408343105keywords = diaphyseal (Clic here for more details about this article) |
5/27. Symptomatic bursa formation with osteochondromas.Two cases of bursa formation in association with osteochondromas are presented. This condition may be confused radiographically and clinically with malignant transformation of the cartilage cap. Ultrasound examination on one of the patients proved helpful in arriving at the correct preoperative diagnosis. ultrasonography was also helpful to the surgeon with regard to size and extent of the bursa.- - - - - - - - - - ranking = 1keywords = osteochondromas (Clic here for more details about this article) |
6/27. Malignant fibrous histiocytoma associated with diaphyseal medullary stenosis.An unusual presentation of secondary malignant fibrous histiocytoma of the femur in a patient with diaphyseal medullary stenosis is described. The patient, a 42-year-old man, presented with a painful lump in the right knee. A radiograph of the right femur showed lytic destruction. Characteristic features of longitudinal linear striations in the metaphysis and medullary stenosis in the diaphysis were observed in radiographs of the long tubular bones. A radiograph of the pelvis showed bilateral acetabular bone scleroses. After chemotherapy, surgical resection was done. On light microscopic examination, the tumor had features characteristic of malignant fibrous histiocytoma. Specimens from the diaphyseal medullary stenosis from the femur and tibia showed typical features of bone infarction. Radiographs of other members of the patient's family showed similar features of linear striation, cortical bone thickening, and acetabular sclerosis, including wavy, open growth plate of the iliac crest. The patient's aunt had died of a bone sarcoma in the shoulder region. It is important to recognize this extremely rare clinicopathologic type of diaphyseal medullary stenosis that frequently is associated with secondary high-grade sarcomas.- - - - - - - - - - ranking = 0.11507497168035keywords = diaphyseal (Clic here for more details about this article) |
7/27. Pseudoaneurysm complicating osteochondromas: symptom relief with embolization.Pseudoaneurysm is a recognized vascular complication of osteochondromas. The diagnosis is confirmed by various imaging techniques including ultrasound, magnetic resonance imaging, and conventional angiography. Surgical repair and excision of the adjacent osteochondroma is considered the treatment of choice. The authors report a case of successful transarterial embolization using helical microcoils in the treatment of osteochondroma-related pseudoaneurysm of the superficial femoral artery. It resulted in complete obliteration of blood flow to the pseudoaneurysm and good symptomatic relief before subsequent semielective surgery. No complication was encountered during the procedure. Transarterial embolization is a safe mode of treatment in experienced hands. In patients with contraindications to surgery, embolization may be considered a definitive treatment.- - - - - - - - - - ranking = 1keywords = osteochondromas (Clic here for more details about this article) |
8/27. Bizarre parosteal osteochondromatous proliferation (Nora's lesion): a retrospective study of 12 cases, 2 arising in long bones.Twelve cases of bizarre parosteal osteochondromatous proliferation (BPOP), also known as Nora's lesion, are reported. Ten lesions were located in the small bones of the hands, and 2 were located in long bones (femur and proximal tibia). Patient age ranged from 12 to 63 years (average, 30.3 years). radiography of the lesions in the hand bones showed calcific masses attached to the underlying cortex, without interruption of the latter. The long bone lesions revealed unusual findings. In the femur, BPOP presented with extensive cortical destruction and was suggestive of a malignant lesion. This presentation has not been described to date. In the tibia, the lesion was located in the soft tissue without cortical attachment. This type of BPOP probably represents an immature lesion that over time will mature to solid cortical attachment. On histologic examination, all lesions demonstrated 3 distinct components with variable degrees of representation: (1) hypercellular cartilage with calcification and ossification, with the calcified cartilage having a characteristic basophilic tinctorial quality; (2) cancellous bone undergoing maturation; and (3) spindle cell stroma without cytologic atypia. In 1 case with a long-standing history, the cartilaginous component was minimal. BPOP, together with florid reactive periostitis and turret exostosis, may represent different stages in the development of a posttraumatic proliferative process. BPOP apparently arises from the periosteal tissues through a process of cartilaginous metaplasia.- - - - - - - - - - ranking = 0.1537035524056keywords = exostosis (Clic here for more details about this article) |
9/27. Case report 715. Necrotic giant cell tumor of the femur.We present a giant cell tumor of the distal end of the femur that exhibited unusual diaphyseal extension and atypical MRI features. MRI demonstrated differing zonal signal characteristics in the distal metaphyseal/epiphyseal versus the diaphyseal components of the tumor. It also depicted an irregular, proximal tumor margin with an unusual, enhancing, peripheral zone. The atypical MRI features may be related to the unusual finding at pathological examination of an almost entirely necrotic giant cell tumor. This massive necrosis may illustrate a stage in the evolution of some giant cell tumors to fibrous histiocytoma-like variants of giant cell tumor or to conventional, benign fibrous histiocytoma of bone.- - - - - - - - - - ranking = 0.032878563337242keywords = diaphyseal (Clic here for more details about this article) |
10/27. MRI in diagnosis of osteoid osteoma of the proximal femur: a potentially deviating aspect. Description of a clinical case.Osteoid osteoma constitutes 10-12% of all benign neoplasms of the bone. The tumor more frequently involves the male sex (male to female ratio 2.1:1) and it may be observed in all age groups, with evident predilection for the second decade of life. All of the skeletal segments may be affected, but the most frequent site is the long bones, in the diaphyseal, metaphyseal and more rarely epiphyseal regions. The lesion is characterized by an osteolytic area, the nidus, which is at times partially calcified, surrounded by an osteosclerotic zone that is more or less accentuated. Clinical suspicion and traditional radiography are essential in diagnostic orientation; usually, further imaging methods are also recommended, such as bone scan with Tc99, CT scan and MRI. This last method allows for easy localization of the lesion, although with a sensitivity that is less than that of the CT scan. Nonetheless, the finding, if not supported by clinical suspicion, may be dangerously deviating and it may orient diagnosis towards a more aggressive disease.- - - - - - - - - - ranking = 0.016439281668621keywords = diaphyseal (Clic here for more details about this article) |
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