Fig. 1
From: A rare case of primary breast angiosarcoma in a male: a case report
Tumor located at the upper region of the right breast in a male (a). Hypoechoic mass with partially defined contours, measuring 4.0 × 3.0 cm at the upper region of the pectoralis major muscle at the 12 o’clock position on ultrasonography (b). Poorly differentiated angiosarcoma (Histopathology, HE staining of 400×) (c). Immunohistochemical study showed positivity for CD31 endothelial marker (d)