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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Am J Surg Pathol. 2021 Jan;45(1):77–92. doi: 10.1097/PAS.0000000000001572

Figure 2. Histopathologic features of selected cases (see text and tables for further details).

Figure 2.

a-d) UMT06 - sarcoma associated with leiomyosarcoma-like and PEComa-like features. a) H&E – biphasic tumor composed of a moderately atypical spindle cell component and an epithelioid cell component showing moderate to marked nuclear pleomorphism; b) Desmin; c) SMA; d) HMB-45.

e-g) UMT08 - myogenic sarcoma, most likely leiomyosarcoma. e) H&E – predominantly atypical spindle cells in a whirling fascicular arrangement; f) Desmin; g) Melan-A.

h-k) UMT05 - sarcoma, not otherwise specified. h) H&E – sheets of highly pleomorphic epithelioid cells (the primary tumor was reportedly composed predominantly of spindle cells); i) Desmin; j) SMA; k) HMB-45.