Mammary cystosarcoma with mature adipose stromal differentiation (lipophyllodes tumor) arising in a lipomatous hamartoma.

Rosen, P P; Romain, K; Liberman, L · Arch Pathol Lab Med · 1994

case_report · Level V

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Abstract

This report documents an uncommon variant of benign cystosarcoma phyllodes with mature adipose stromal differentiation, for which the term lipophyllodes tumor is proposed. Origin of this unusual tumor within a lipomatous hamartoma was confirmed by histologic and mammographic observations. The lesion developed in a 40-year-old woman 2 months post partum, and she remained well after treatment by biopsy. Lipophyllodes tumor, which features mature adipose tissue in much of the stromal component of a cystosarcoma, should not be mistaken for a malignant neoplasm. Complete excision is adequate therapy.

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