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

Figure 2

Histologic features of tumor in the left inguinal lymph node. (a) The RMS-like component showed variably sized cystic spaces separated by fibrovascular septa. (b) Cystic spaces lined by loosely cohesive primitive cells floating into spaces, imparting an alveolar pattern. (c) The tumor cells demonstrated nesting pattern within the fibrovascular septa (hematoxylin-eosin, original magnification ×40 (a); original magnification × 200 (b); original magnification ×400 (c)).

(a)

(b)

(c)