Fig. 2
From: Retroperitoneal fibrous tumor recurring as lung metastases after 10 years: a case report
Surgical specimen and histological findings (HE and immunohistochemical staining). a Macroscopic findings showed a well-circumscribed and encapsulated elastic hard tumor, 16 × 16 × 10 cm; b tumor consisted of spindle-shaped cells with a patternless arrangement and hemangiopericytomatous appearance (×200); c, d immunohistochemical stains were positive for c CD34, d and vimentin