transformation in a cellular angiofibroma: a case report.
mesotheliomas for the most part do not show specific ultrastructural features, and tumors that are poorly differentiated by light microscopy and do not demonstrate a typical pattern of immunohisto-chemical staining usually lack specific features by electron microscopy as well.
1) The epithelial component in our case included squamous cell carcinoma, which was keratin and epithelial membrane antigen positive, and the sarcomatous
component, which stained positive for vimentin, desmin, and myoglobin.
Therefore, in comparison with the reported 0-10% 5-year survivals of adenocarcinoma, Sarcomatous
carcinoma of gallbladder has a similar but slightly better prognosis (5).
21-30 M 3 2 1 F 2 1 1 31-40(a) F 2 1 -- 41-50 M 9 8 -- F 4 2 -- 51-60 M 8 7 1 F 1 - 1 61-70 M 12 8 1 F 5 4 -- [is greater than or M 4 3 1 equal to] 70(b) Total M 36 28 4 F 14 8 2 M and F 50 36 6 Age groups Sex Biphasic Desmoplastic 21-30 M -- -- F -- -- 31-40(a) F 1 -- 41-50 M 1 -- F 2 -- 51-60 M -- -- F -- -- 61-70 M 2 1 F 1 -- [is greater than or M -- -- equal to] 70(b) Total M 3 1 F 4 -- M and F 7 1 (a) There was no male case in this age group.
Renal angiomyolipoma with epithelioid sarcomatous
transformation and metastases: demonstration of the same genetic defects in the primary and metastatic lesions.
Recent studies report a lifetime risk of sarcomatous
transformation in single lesions of approximately 1% but up to 5% in HME.
degeneration is much less likely, occurring in < 2% of cases.
Malignant rhabdoid tumor has been a somewhat controversial entity since it was first described in 1978 as a possible sarcomatous
variant of Wilms tumor.
components of these tumors may consist of generally undifferentiated malignant mesenchymal elements, the classic homologous pattern, or any combination of skeletal muscle, smooth muscle, cartilaginous, or bony differentiation, the heterologous pattern.
Histologic analysis suggested angiosarcoma of the liver (Figure 1); dense rows of tumorous cells (Figure 1A) can be seen near the areas of hemorrhage, and the vascular space of the tumor is lined with atypical endothelium, marked sarcomatous
stroma, dense rows of tumorous cells with distinct polymorphism, and hyperchromatosis (Figure 1B).
Spindle cell mesothelial proliferations fall into 3 categories: organizing pleuritis (OP, also called fibrous pleurisy or fibrosing pleurisy), DMMs/sarcomatous
mesotheliomas, and atypical mesothelial proliferations (atypical mesothelial hyperplasia), used for lesions worrisome for, but not diagnostic of, DMM or sarcomatous