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    Am J Surg Pathol. 2003 May;27(5):689-92.

    Clear cell myomelanocytic tumor of the urinary bladder.

    Source

    Department of Pathology, National Yang-Ming University and Veterans General Hospital-Taipei,Taiwan. ccpan@vghtpe.gov.tw

    Abstract

    Clear cell myomelanocytic tumors are a recently described neoplastic growth considered to be a member of the family of perivascular epithelioid cell tumor. These tumors have a predilection for falciform ligament/ligamentum teres. We report an additional case arising from the muscularis propria of the urinary bladder in a 33-year-old woman. The tumor consisted of clear to eosinophilic, epithelioid, and spindled cells arranged in fascicles or packets. A delicate vascular stroma was found among the nests. Immunohistochemically, the tumor cells were typically positive for HMB-45 and smooth muscle actin but negative for S-100 protein, Melan-A, desmin, and pan-cytokeratin. The patient has been free of the disease since the excision of the tumor 6 years ago. This case, in association with the expanding list of perivascular epithelioid cell tumor reported in different sites, suggests that this type of neoplasm may be ubiquitous.

    PMID:
    12717254
    [PubMed - indexed for MEDLINE]

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