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WHO Classification of Tumours
Mesenchymoma, malignant
Connective, subcutaneous and other soft tissues


A term describing a malignant soft tissue tumor which consists of two or more mesenchymal lines of differentiation.
A WHO Working Group concluded, that this designation does not form a well defined clinicopathological entity

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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002

, and that a more specific sarcoma diagnosis should be used whenever possible.