1/18. Vertebral intra-osseous chordoma or giant notochordal rest?Chordomas of the lumbar vertebral bodies are rare. We report an unusual case of an entirely intraosseous chordoma of the fifth lumbar vertebra treated by vertebrectomy. Conventional radiographs and scintigraphy were normal. The lesion was well visualised by MR imaging, but showed only slight sclerosis on CT. We give our reasons for making a diagnosis of chordoma rather than giant notochordal rest and discuss the problems of management resulting from this diagnostic dilemma.- - - - - - - - - - ranking = 1keywords = giant (Clic here for more details about this article) |
2/18. Chondromyxoid fibroma of the acromium with soft tissue extension.Chondromyxoid fibroma is an unusual, benign tumor of cartilaginous origin and represents less than 1% of all primary bone tumors. It usually involves the long bones around the knee joint or the flat bones of the pelvis or ribs. Soft tissue extension is also thought to be rare in these lesions. They are usually eccentrically located in the metaphyses of the long bones and centrally in the flat bones. The radiographic appearances are characteristically those of a single, lytic lesion with lobulated margins, septations, cortical expansion and a sclerotic rim. Histologically, they display a lobulated pattern with spindle-shaped cells lying within a myxoid matrix with areas of hyaline cartilage. The differential diagnosis includes giant cell tumor, chondroblastoma or enchondroma as well as chondrosarcoma. The rarity of these lesions may render the diagnosis difficult to make, especially when the lesion involves an unusual site such as the acromium.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
3/18. Giant chondroma arising from the dura mater of the convexity. Case report and review of the literature.Chondromas arising from the dura mater are rare intracranial tumors. The authors present a case of intracranial giant chondroma originating from the dura mater of the convexity. neuroimaging and surgical findings are described. The diagnostic clues are discussed and similar cases from the literature are reviewed.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
4/18. Calcifying aponeurotic fibroma features seen on fine-needle aspiration biopsy: case report and brief review of the literature.Calcifying aponeurotic fibroma is a rare benign soft tissue proliferation, which occurs in the distal extremities in children. We describe a case of calcifying aponeurotic fibroma of the hand in a 9 year-old male diagnosed by FNA. Clinically and radiographically this mass was felt to be suspicious for sarcoma, likely alveolar rhabdomyosarcoma. Cytologic examination revealed benign appearing spindled cells, chondroid cells, multinucleated giant cells and calcific debris. These features recapitulate the classic histologic features of calcifying aponeurotic fibroma. Conservative excision was performed and histologic exam confirmed the diagnosis. To the authors' knowledge, this is the first description of the cytologic features of this entity.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
5/18. Chest wall hamartoma. Report of two cases with secondary aneurysmal bone cysts.Chest wall hamartoma is a rare non-neoplastic benign lesion occurring in the neonatal period with particular clinical, radiological and pathological features. Histologically, it is composed of a mixture of bone trabeculae with spindle-cell stroma, chondroblast-like cells, and mature and immature hyaline cartilage. Aneurysmal bone cyst is a benign lesion that may arise secondary to several bone processes, such as giant cell tumor, chondrosarcoma, non-ossifying fibroma or osteosarcoma. We present two new cases of chest wall hamartoma with secondary aneurysmatic bone cyst formation studied with histological and immunocytochemical methods.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
6/18. Giant chondromas arising from the ribs. A report of four cases.Chondromas may arise from the ribs but seldom grow to giant size. In a series of twenty-one cases, four giant tumours were encountered. Three were treated by excision without leaving a significant defect of the chest wall or impairment of respiration; the fourth was examined by biopsy. No evidence of malignant change was discovered in these four large tumours.- - - - - - - - - - ranking = 0.4keywords = giant (Clic here for more details about this article) |
7/18. Giant vertebral notochordal rest: a lesion distinct from chordoma: discussion of an evolving concept.A 14-year-old boy with severe back pain for several years is described. Roentgenograms, bone scans, and computed tomographic scans of the spine were normal, but magnetic resonance imaging studies showed a lumbar vertebral body lesion, confined to the bone, with low T1- and high T2-weighted signal intensities. Histologically, the lesion consisted of sheet-like notochordal-type tissue, containing physaliphorous cells but lacking the usual features of chordoma. A diagnosis of giant notochordal rest was made. A review of prior possible examples of this recently described and controversial entity is made with a discussion of its embryologic foundations and distinction from chordoma.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
8/18. A case of chondromatous tumor of the breast.This report describes an exceedingly rare case of a benign cartilage-containing breast tumor that developed in the right breast of a 52-year-old woman. She found the mass on self examination. physical examination revealed a 1.5 x 1.4 cm, firm, smooth and mobile lump in the lower medial quadrant close to the nipple of the right breast. mammography revealed a slightly indistinct margined, oval-shaped, and high density nodule without microcalcifications. On ultrasonography, the lesion was a hypoechoic, oval-shaped mass with an echogenic spot. The border was slightly rough. Fine needle aspiration cytology revealed some giant cells and necrotic tissue. Excisional biopsy was then performed. Histopathologically, the lesion consisted of islands of mature hyaline cartilage with intervening strands of fibrous stroma. Mammary lobules and ducts were lacking within the mass. Fat and muscular components were not present. Therefore chondromatous tumor of the breast was diagnosed.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
9/18. Giant ossifying chondroma of skull.We report a rare case of giant ossifying chondroma of skull arising from temporoparietal region in a 14-year-old female, which was successfully excised. While reviewing world literature few cases of extracranial chondromas arising from the skull base were found.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
10/18. Case report 713. Chondromyxoid fibroma of the third metatarsal.In the case presented, the imaging features are those of an aggressive benign or less aggressive malignant lesion. The differential diagnosis radiographically included aneurysmal bone cyst with or without an accompanying lesion, giant cell tumor synovial sarcoma, and other mesenchymal sarcomas. Indeed, at times it is difficult to be certain whether the process originated in the bone or soft tissue. Pathological examination of the resected specimen showed the typical features of chondromyxoid fibroma. Grossly, the tumor was well demarcated and firm and composed of tan, translucent tissue that destroyed cortex but was confirmed by periosteum. Histologically, the tumor consisted of myxoid, chondroid, and fibrous elements. The tumor lobules were composed of predominately myxoid matrix containing stellate cells. Variable chondroid elements were present with immature appearing chondrocytes, containing eosinophilic cytoplasm and irregularly shaped nuclei.- - - - - - - - - - ranking = 0.2keywords = giant (Clic here for more details about this article) |
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