Smooth muscle tumors of the vulva.

F. A. Tavassoli, Henry J. Norris

PubMed · 1979 · 213 citations · 11 references

Concepts

TL;DR

The study examined 32 vulvar smooth muscle tumors to identify pathological features that distinguish leiomyomas from leiomyosarcomas and to guide treatment decisions. The authors retrospectively reviewed 32 vulvar smooth muscle tumors, collecting clinical and histopathologic data with follow‑up ranging from 16 months to 20 years (median 9 years). No metastases occurred; recurrence was limited to four tumors, with aggressive behavior seen only in infiltrating lesions with high mitotic counts, while pregnancy‑associated tumors showed myxoid change but remained benign.

Abstract

The clinical and pathologic features of 32 smooth muscle tumors of the vulva were studied to determine the pathologic characteristics that best relate to the clinical behavior and to define criteria for separating leiomyomas from leiomyosarcomas. The length of follow-up ranged from 16 months to 20 years, with a median of 9 years. None of the tumors metastasized. Of the 4 neoplasms that recurred, the 2 with infiltrating margins recurred within 1 year and of these 2, the one with more than 5 mitotic figures in 10 high-power fields (HPF) recurred 5 times within a 2-year period. Neoplasms were discovered during pregnancy in 7 patients; these were characterized by extensive myxoid change, but none of the tumors that occurred during pregnancy showed significant cellular atypism or mitotic activity. Local excision is recommended as initial therapy and also for recurrences.

References

11