Metastatic Malignant Ectomesenchymoma Initially Presenting as a Pelvic Mass: Report of a Case and Review of Literature

Figure 6

Histologic and immunohistochemical features of tumor in the left cerebellum. (a) Microscopic photographs from left cerebellar resection show sheets of primitive tumor cells with neuroblastic rosettes resembling a primary medulloblastoma. The tumor cells demonstrate immunohistochemical reactivity for (b) myogenin, (c) CD56, and (d) tyrosine-hydroxylase to show both myogenic and neural differentiation (original magnification ×200 (a–d)).

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