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- W2108953129 abstract "We present 19 cases of primary breast malignant fibrous histiocytoma (MFH) or myxofibrosarcoma/pleomorphic sarcoma not otherwise specified, the largest series to date, and compare our results with those in the literature to better define MFH in this anatomical location. Twenty-seven cases (MFH, myxofibrosarcoma, or pleomorphic sarcoma not otherwise specified) were reviewed using World Health Organization and French Federation of Cancer Centers criteria. Inclusion required location within breast parenchyma without extensive chest wall involvement. Morphological features were recorded, and immunohistochemistry was applied. Clinical data were extracted from patients' medical records. Clinically, there was 1 male patient. Of 15 patients with follow-up, 5 (33% overall) died of disease within an average of 7 months after diagnosis. Distant metastases and older patient age were associated with poor survival. Storiform-pleomorphic subtype was most common (10/19) with myxofibrosarcoma (6/19) and giant cell subtype (1/19) also observed. Unique lymphocyte-rich (1/19) and pleomorphic hyalinizing angiectatic tumor-like (1/19) morphologies are presented. Immunohistochemistry demonstrated expression of CD68 (71%), focal smooth muscle actin (36%), with rare focal estrogen and progesterone receptor immunoreactivity. All cases were negative for CD34, S-100 protein, desmin 33, and keratins, including CK7, CK20, CK5/6, and CK18. Malignant fibrous histiocytoma occurs as a primary lesion in breast parenchyma. Attention to morphological detail and immunohistochemistry avoids misdiagnosis. Entrapped breast ductal epithelium should not be misinterpreted as the epithelial component of a biphasic tumor. A florid lymphoid response should not be confused with metaplastic carcinoma. Pleomorphic hyalinizing angiectatic tumor-like features may be observed in MFH. Our study confirms the presence of MFH in breast and presents unique morphological observations of primary breast MFH." @default.
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- W2108953129 date "2011-12-01" @default.
- W2108953129 modified "2023-10-16" @default.
- W2108953129 title "Primary malignant fibrous histiocytoma (myxofibrosarcoma/pleomorphic sarcoma not otherwise specified) of the breast: clinicopathologic study of 19 cases" @default.
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- W2108953129 doi "https://doi.org/10.1016/j.anndiagpath.2011.05.007" @default.
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