Fig. 3
From: Giant low-grade primary myofibroblastic sarcoma of the posterior chest wall
Histopathological analysis showing spindle-shaped tumour cells arranged in interlacing fascicles or storiform pattern with scattered necrosis and haemorrhage (a–b; HE staging, original magnification ×400). The tumour cells were positive for SMA and CD99 and negative for desmin and CD34, all consistent with low-grade myofibrosarcoma (c–d; immunohistochemical staging, original magnification ×400)