Benign Mesenchymoma

Definition 1

A term describing a benign soft tissue tumor which consists of two or more mesenchymal lines of differentiation, excluding a fibroblastic line of differentiation. (NCI Thesaurus)

Definition 2

A benign soft-tissue neoplasm comprising two or more non-fibroblastic mesenchymal lines of differentiation. (NCI Thesaurus/CDISC)

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Benign Mediastinal Hemangiopericytoma

A benign hemangiopericytoma arising from the mediastinum.