Lipoma of the uterus : Clinical and ethiopathological approach of 7 cases with immunohistochemical study of histogenesis

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Published Nov 29, 2010
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Vol. 88 No. 12 (2010): Issue Dec 2010

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Olfa El Amine El Hadj
Saadia Bouraoui
Carole Goutallier Ben Fadhel
Ahlem Lahmar
Sabeh Mzabi Regaya

Abstract

Background: Lipoleiomyoma of the uterus (LLU) is an extremely rare, benign, uterine tumour. This rare disease was unknown for a long time. Their histogenesis remains controversial.
Aim: To describe the clinical and pathological aspects of uterine lipoleiomyoma and to try to specify, by an immunohistochemical study, its degenerative or tumoral nature.
Methods: 7 cases of LLU were identified represented by 2 pure Lipoma and 5 Lipoleiomyoma. We performed an immunohistochemical study including anti-vimentin, anti-smooth muscle actin, anti PS-100, anti-desmin, anti-factor VIII and anti-HMB- 45. The results were correlated with the pathogenesis of this lesion.
Results: Immunohistochemical analysis showed an expression of PS 100 only in lipocytes whereas leiomyomatous cells express only smooth muscle actin.
Conclusion: Our study supports the benign tumoral nature of the fatty uterine lesions. Lipoleiomyomatous cells may originate from the transformation of a totipotent mesenchymal cell and not from a degenerative process.

Keywords:

Uterus, lipoma, leiomyoma, actin smooth muscle, VIII factor

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