| Patients with certain rare tumours, such as liver metastases from neuroendocrine disease and sarcomas, can do well for several years. |
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| Unlike carcinomas, metastatic sarcomas generally occur deeper and may not ulcerate the mucosa. |
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| High-grade soft tissue sarcomas are a group of malignancies that often affect otherwise healthy young people. |
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| Among the topics discussed are how to code gastrointestinal sarcomas and malignant lymphomas, as well as malignant thymomas. |
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| These patients are also at risk for second cancers, including bone, brain, leukemia and lymphoma, melanomas, and soft tissue sarcomas. |
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| Equally unclear is the histogenesis of intracranial sarcomas and particularly rhabdomyosarcomas. |
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| Distinguishing sarcomatoid mesothelioma from sarcomatoid carcinomas and other sarcomas may be difficult. |
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| Keratin expression is typical of epithelial differentiation in carcinomas and some sarcomas. |
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| The grade, size and depth of the sarcomas are the important factors to prognosticate the disease. |
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| Chondroid lipoma is a rare, benign variant of lipomatous tumor that can mimic soft tissue sarcomas. |
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| Sebaceous cysts, fibromas, papillomas, adenomas, sarcomas, carcinomas, and melanomas also have been reported. |
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| A number of examples of tumors with some malignant features exist, for example, oyster epithelioma, neurofibromas, sarcomas, and leukocytic neoplasms. |
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| An exact clinical pathological diagnosis is often difficult, while the demonstration of the specific fusion protein is diagnostic for these rare sarcomas. |
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| The second group called sarcomas, arise from the substance of solid tissues such as muscle, bone, lymph glands, blood vessels and fibrous and other connective tissues. |
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| Macroscopically, pleomorphic sarcomas are nodular or multinodular, tan-white to gray tumors that may be associated with necrosis and hemorrhage. |
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| Embryonal rhabdomyosarcomas are the most common soft tissue sarcomas in children. |
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| Microscopic evaluation of mitotic activity is a routine procedure in assessing the grade of tumors, such as soft tissue sarcomas, meningiomas, or breast carcinomas. |
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| Extraskeletal osteogenic sarcomas and chondrosarcomas in children. |
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| Results from a large case series of retroperitoneal sarcomas found leiomyosarcomas to be the second most common form of retroperitoneal sarcoma, after liposarcomas. |
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| Myeloid sarcomas are most often positive for myeloperoxidase and lysozyme. |
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| In regard to chemotherapy, the most important decision facing surgeons attempting curative resections of primary soft tissue sarcomas is the use of neoadjuvant therapy. |
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| Primary malignant neoplasms of the fallopian tube are rare and include carcinomas, sarcomas, and even more rarely, tumors composed of both epithelial and mesenchymal elements. |
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| Sarcomas are the most common neoplasm, followed by carcinoids and adenocarcinomas. |
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