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Virchows Arch. 2006 Aug;449(2):244-7. Epub 2006 May 20.

Extramammary myofibroblastoma is genetically related to spindle cell lipoma.

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  • 1Department of Morphology and Molecular Pathology, University Hospital, Catholic University Leuven, Leuven, Belgium.

Abstract

Extramammary-type myofibroblastoma is a rare, benign spindle cell lesion, strictly resembling the breast counterpart, but occurring in extramammary sites, mainly in the inguinal/groin area. In this paper, we describe an extramammary-type myofibroblastoma in the groin of a 37-year-old male patient. The tumor showed a typical morphological and immunophenotypical profile, including staining for both CD34 and desmin. Dual-color interphase florescent in situ hybridization analysis revealed losses of RB/13q14 and FKHR/13q14 loci within tumor cells. The chromosome 13 rearrangements associated with the loss of the 13q14 chromosomal region are typically seen in spindle cell lipoma, and have been previously recognized in mammary myofibroblastoma, providing strong evidence for a pathogenetic link between these lesions.

PMID:
16715228
[PubMed - indexed for MEDLINE]
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