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

Figure 4

Immunohistochemical features of tumor in the left inguinal lymph node. (a) Microscopic photographs from left inguinal lymph node biopsy reveal primitive tumor cells with nodular growth pattern. The tumor cells demonstrate immunohistochemical reactivity for (b) myogenin, (c) PGP9.5, and (d) tyrosine-hydroxylase to show both myogenic and neural differentiation (original magnification ×200 (a–d)).

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