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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: Am J Surg Pathol. 2019 May;43(5):695–702. doi: 10.1097/PAS.0000000000001227

Figure 1: MEIS1-NCOA2 positive iliac bone rhabdomyosarcoma.

Figure 1:

(case 1, 22/M). A) MRI showing a large tumor centered in the iliac bone with extraosseous extension. B) Pre-therapy biopsy shows a highly cellular spindle cell neoplasm with scattered branching vessels and insignificant stromal component; C) higher power with monomorphic spindle cells arranged in a streaming pattern. D, E) Resected tumor s/p chemotherapy reveals spindle cells in intersecting fascicles and scant eosinophilic cytoplasm. Immunohistochemical stains show F) diffuse positivity for desmin and G) focal Myogenin staining.