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WHO Classification of Tumours
Smooth muscle tumor of uncertain malignant potential
Corpus uteri


Smooth muscle tumour of uncertain malignant potential is a smooth muscle neoplasm arising from the uterine corpus that cannot reliably be diagnosed as benign or malignant, because of ambiguous morphologic findings. In some cases, the subtype of smooth muscle differentiation (standard, epithelioid, or myxoid) cannot be determined with certainty. In other cases, diagnostic features, such as type of necrosis or interpretation of mitotic figures, are ambiguous. Differing interpretations make reliable clinical predictions impossible
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Tavassoli FA, Devilee P (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Breast and Female Genital Organs.
3rd Edition
IARC Press: Lyon 2003