1/86. Bizarre parosteal osteochondromatous proliferation in the anterior maxilla: report of a case.Bizarre parosteal osteochondromatous proliferations are a rare subgroup of the osteochondromatous lesions. They must be differentiated from reactive osteochondromatous proliferations, low grade parosteal osteogenic sarcoma, and chondrosarcoma. Their recognition is important from the point of view of management, which should be by simple excision. This article describes a case of bizarre parosteal osteochondromatous proliferation in a 2-year-old child; the lesion developed in the anterior maxilla, a previously unreported site.- - - - - - - - - - ranking = 1keywords = life (Clic here for more details about this article) |
2/86. Extraosseous osteogenic sarcoma--a rare pediatric malignancy: case report and review of the literature.BACKGROUND: Osteogenic sarcoma rarely occurs in soft tissues and generally affects individuals beyond the second decade of life. methods: The authors report a rare case of an extra osseous osteogenic sarcoma arising in the retroperitoneum of an adolescent, review the literature, and outline the diagnostic and therapeutic dilemmas. The role of adjuvant chemotherapy, using drugs used in managing bony osteosarcomas, is discussed. CONCLUSIONS: Retroperitoneal sarcomas may simulate ovarian teratomas. Careful consideration of the differential diagnosis of large cystic abdominal masses in adolescent females when size precludes adequate assessment of tumor mobility and imaging fails to demonstrate the ovaries is essential if these rare tumors are to be managed effectively.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
3/86. Parosteal osteosarcoma of the scapula.Parosteal osteosarcoma is a low-grade osteosarcoma, which occurs on the surface of the bone. We had experienced a parosteal osteosarcoma involving the flat bone, the scapula of a 21-year-old man. This is an extremely rare location for a parosteal osteosarcoma. Plain radiograph showed broad-based, well-defined radiodense lesion at the scapula. Computed tomogram demonstrated an intact cortex and absence of a medullary involvement. Tumor showed a lobulated, high-density lesion, indicating bone formation. Histologically, parosteal osteosarcoma is a well-differentiated osteosarcoma. The tumor is composed of a hypocellular proliferation of spindle cells, with minimal cytologic atypia. The bone is in the form of a well-formed bony trabeculae. Occasional cartilage is present in the form of a cap.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
4/86. The multiple sclerotic osteogenic sarcoma of early childhood.Two cases of sclerosing osteogenic sarcoma that occurred in early childhood are reported. They and the similar cases reviewed are unusual in their development at an unusually early age, their multicentric presentation and their densely sclerotic nature. These are uncommon manifestations of osteogenic sarcoma and are considered due to proliferative metastatic osteoid formation in areas of rapid bone growth.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
5/86. Primary osteosarcoma of the skull.In 33 cases of primary osteosarcoma of the skull in a relatively old age group, the sex ratio and poor prognosis is the same as in osteosarcoma of long bones. However, patients in the second decade of life free of neurologic disease have a better prognosis.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
6/86. Aneurysmal bone cyst of the larynx presenting with hypoglottic obstruction.We report a new case of aneurysmal bone cyst of the larynx occurring in a 22-year-old man. The lesion manifested with progressive breathing discomfort and appeared as a polypoid pedunculated mass attached to the subglottic mucosa. Microscopically, it featured numerous mononuclear and multinucleated giant cells surrounding cavernous spaces filled with blood. Foci of proliferating spindle cells and mature osteoid tissue could be recognized. There was no apparent relationship with the cricoid perichondrium. Clinical follow-up was negative for local recurrence. Based on this report and a review of the literature, we conclude that aneurysmal bone cyst of the larynx is phenotypically comparable to its bone homologue; however, its microscopic recognition may be difficult, especially on small biopsy fragments. Since it can be confused with several lesions, including telangiectatic osteosarcoma, awareness of this rare appearance of aneurysmal bone cyst is important to avoid unnecessary radical surgery.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
7/86. Primary osteosarcoma of the uterine corpus: report of a case with immunohistochemical and ultrastructural study.BACKGROUND: Primary uterine osteosarcoma is extremely rare, with only 15 cases reported in the literature. CASE: A 41-year-old woman presented with abnormal vaginal bleeding due to a large tumor arising from the uterine corpus. Histologically, the tumor showed the features of a malignant mesenchymal neoplasm with osteoid formation and lacked an epithelial component. Immunohistochemical and ultrastructural studies showed no evidence of epithelial differentiation. The tumor was excised and the patient received chemotherapy and radiation therapy postoperatively, but the tumor recurred locally at the 8-month follow-up. CONCLUSION: osteosarcoma as a primary uterine tumor is exceedingly rare and should be distinguished from carcinosarcoma, which shows different macroscopic and histologic features. prognosis of this neoplasm is very poor with an average life expectancy of 5 months.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
8/86. plasmapheresis for thrombotic thrombocytopenic purpura following bone marrow transplantation.Recognition of thrombotic thrombocytopenic purpura (TTP)/hemolytic uremic syndrome (HUS) following bone marrow transplantation (BMT) has increased in recent years. The use of plasma exchange has greatly improved the outlook of de novo TTP. Fewer data are available on its use in post-BMT TTP but small uncontrolled series showed poor results with low response rates. We present here a case of a young patient who developed manifestations of TTP 10 months after BMT with complete recovery following treatment with plasma exchange for 1 month. This case suggests that plasma exchange could be life saving and should be tried in every patient with post-BMT TTP.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
9/86. Bizarre parosteal osteochondromatous proliferation: case report and review of the literature.Bizarre parosteal osteochondromatous proliferation of bone (BPOP) is a benign lesion that is occasionally misinterpreted as a malignant process. The original reports described lesions exclusively in the hands and feet. However, subsequent reports have included additional sites in the long bones, skull, and maxilla. The differential diagnosis of BPOP includes numerous benign and malignant lesions. The benign differential diagnosis includes osteochondroma and reactive processes. The most important malignant differential diagnosis is parosteal osteosarcoma. We present a case of an 11-year-old boy with recurrent BPOP and review the literature. We discuss the differential diagnosis and pathogenesis of the lesion.- - - - - - - - - - ranking = 0.71428571428571keywords = life (Clic here for more details about this article) |
10/86. Rapidly growing fibro-osseous pseudotumor of the digits mimicking extraskeletal osteosarcoma.Fibro-osseous pseudotumor of the digits is a rare benign lesion characterized histopathologically by a fibroblastic proliferation with foci of osseous differentiation. We report a case of fibro-osseous pseudotumor of the digits with a rapidly growing lesion in a 30-year-old woman. Because of its rapid growth and aggressive histopathological appearance, this lesion can be mistaken for a malignant neoplasm such as extraskeletal or parosteal osteosarcoma, despite its benign clinical behavior. For a soft tissue mass in the digit with a clinicopathological feature of pseudomalignancy, the clinician should consider fibro-osseous pseudotumor of the digits as a possible diagnosis, thereby avoiding inappropriately aggressive surgery.- - - - - - - - - - ranking = 0.14285714285714keywords = life (Clic here for more details about this article) |
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