Cases reported "Fibroma"

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1/192. Pseudosarcoma in Paget's disease of bone.

    The appearance of a sarcoma of bone is a well-recognized complication of Paget's disease. The most common type of such a sarcoma is osteosarcoma. Much less common are soft tissue lesions adjoining the pagetic bone that clinically and radiologically simulate sarcoma but histologically represent exaggerated periosteal bone formation as a manifestation of the basic pathologic process. We present a case of a bulky juxtacortical soft tissue mass in the thigh arising from a pagetic femur in a 62-year-old patient with polyostotic Paget's disease that was clinically and radiologically suspected to be a juxtacortical osteosarcoma. Microscopically, the lesion showed features of florid Paget's disease without any evidence of sarcomatous growth. It is important to be aware of this rare manifestation of Paget's disease to avoid unnecessary overtreatment.
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2/192. Pathological fracture in non-ossifying fibroma with histological features simulating aneurysmal bone cyst.

    A 12-year-old-girl presented with a fracture of an osteolytic lesion of the distal radius. A 7-year-old girl presented with a fracture of an osteolytic lesion of the femoral shaft. In both cases it was a non-ossifying fibroma with fracture misdiagnosed at pathology as aneurysmal bone cyst. Fractures through non-ossifying fibromas may alter the histological pattern of the initial lesion in two ways: firstly, by the presence of blood pigments due to the fracture, and secondly, by formation of new bone. Radiological-pathological correlation is essential to avoid histological errors after pathological fracture in a non-ossifying fibroma.
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ranking = 0.85714285714286
keywords = bone
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3/192. Juvenile ossifying fibroma: an ultrastructural study.

    The ultrastructural features of a juvenile ossifying fibroma of the maxilla are described. The stromal portion of the tumor was composed of osteoblasts and to a lesser extent of fibroblasts. The bone spicules were rimmed by osteoblasts and osteoclasts. Calcification was seen to occur along the collagen fiber matrix, corresponding to calcification of osteoid, and also in the form of intracellular and extracellular crystallization. The latter form of calcification corresponded to so-called psammoma-like bodies, and was considered characteristic of this subtype of ossifying fibroma.
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keywords = bone
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4/192. Central fibroma in the ascending ramus of the mandible. Case report.

    A case of central fibroma involving the mandible in a 58 year old woman is described. There was slight swelling of the left cheek and bone-hard bulging was detected on palpation but the patient had not complained of the swelling. The lesion was removed under general anaesthesia and then examined histopathologically. There was no sign of recurrence eleven months after the operation.
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ranking = 0.14285714285714
keywords = bone
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5/192. Giant central ossifying fibroma of the mandible: report of case.

    A case is presented of a patient with a giant ossifying fibroma of the mandible that had been diagnosed earlier as fibrous dysplasia. Surgical resection of the tumor and involved bone was chosen as the mode of treatment because of the extent of the lesion and continued infection. Surgeons should be aware that ossifying fibroma is a very distinct possibility in large growing lesions in age groups older than is deemed compatible with fibrous dysplasia.
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ranking = 0.14285714285714
keywords = bone
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6/192. Cranial fasciitis in an adult: CT and MR imaging findings.

    Cranial fasciitis is a rare bone lesion in childhood. We report the first case in an adult, with CT and MR imaging, and suggest some diagnostic keys.
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ranking = 0.14285714285714
keywords = bone
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7/192. Fibromyxoma of the petrous apex.

    The common petroclival bony tumors are chordoma and chondrosarcoma. myxoma of the bone occurs only in the facial bones, and it has not been reported in skull bones. The computed tomographic scanning, magnetic resonance imaging and intraoperative characteristics of a case of fibromyxoma of the petrous bone in a 14-year-old girl are described.
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ranking = 0.57142857142857
keywords = bone
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8/192. limb salvage using distraction osteogenesis.

    Distraction osteogenesis is a novel technique for the biological restoration of segmental bone defects. Definitive treatment of musculoskeletal tumors often requires large bony resections that can leave patients with significant osseous defects. limb salvage using distraction osteogenesis is an attractive reconstructive alternative that may, in fact, offer advantages over other conventional techniques. We present our initial experience with the use of distraction osteogenesis in limb salvage.
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ranking = 0.14285714285714
keywords = bone
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9/192. Juxtacortical chondromyxoid fibroma arising in an apophysis.

    We present a rare case of juxtacortical chondromyxoid fibroma arising in the lesser trochanter of the right femur which corresponds to an apophysis. radiography showed a well-defined expansive lesion with a sclerotic margin measuring 5x3.5 cm in diameter in the lesser trochanter. On spin echo T1-weighted images, the lesion revealed low signal intensity similar to muscle. On spin echo T2-weighted images, the lesion revealed high heterogeneous signal intensity, which after gadolinium injection showed heterogeneous enhancement. The inner margin of the cortex was intact and adjacent bone marrow was of normal signal intensity. The outer margin of the lesion was also clearly defined and extension into adjacent soft tissue beyond the exophytic cortical outgrowth was not evident.
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ranking = 0.14285714285714
keywords = bone
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10/192. chondrosarcoma of the proximal femur with myxoid degeneration mistaken for chondromyxoid fibroma in a young adult. A case report.

    BACKGROUND: Fine needle aspiration cytology (FNAC) is effective in the diagnosis of bone tumors when combined with careful radiologic and clinical evaluation. However, cases where clinical or radiologic findings are atypical or unusual may lead to an erroneous diagnosis. CASE: A 19-year-old male presented with a pain in the left hip area that had been slowly progressive over a 10-month period. Clinical and radiologic findings suggested either giant cell tumor or chondroblastoma. The smeared aspiration specimen showed loosely cohesive, oval to round cells with moderate amounts of pale pink cytoplasm admixed with pinkish-blue, chondromyxoid material. The individual cells contained a single nucleus with evenly distributed, fine chromatin. A few osteoclastic giant cells were scattered in the smears. A cytologic diagnosis of myxoid lesion with a few giant cells, suspicious for chondromyxoid fibroma, was made. The diagnosis of chondrosarcoma was made by subsequent histologic examination. CONCLUSION: Absence of the usual clinicoradiologic features of chondrosarcoma combined with an unusual cytologic presentation in this case led to a misdiagnosis. In most centers, FNAC has achieved undisputed status as a diagnostic tool, and cytologic diagnosis often forms the basis of the therapeutic protocol. However, at some sites FNAC diagnosis is more problematic. awareness of the limitations and pitfalls of FNAC is just as important as knowledge of the scope of FNAC in bone tumors. Tumors with chondromyxoid features provide particular difficulties.
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ranking = 0.28571428571429
keywords = bone
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