Figure 3
From: Metanephric adenosarcoma: a rare case with immunohistochemistry and molecular analysis
Histopathological features of the tumor. The unencapsulated tumor consisted of epithelium and stroma components. (A) Some areas were predominantly composed of epithelium identical to metanephric adenoma (H & E, ×200); (B) some areas were predominantly stromal, identical to high-grade sarcomatous tumor (H & E, ×200); (C) there were hypercellular uniform cells in solid-acini pattern, and the cells were small, round and tightly packed in MA area (H & E, ×400). (D) There were highly cellular, consisting of polymorphic spindle cells with obvious nuclear atypia and frequent mitosis in sarcomatous area (H & E, ×400).