Hepatic angiosarcoma manifested as recurrent hemoperitoneum

Figure 1 Initial abdominal computed tomography images. A and B: A large amount of hematoma in lesser sac and a lowly attenuated nodular lesion with peripheral globular enhancement in the left lobe. Abdominal CT images after 1 mo; C and D: increased size of lowly attenuated lesions in the right lobe and the left lateral lobe. One showing septum-like appearance and peripheral enhancement within the mass (black arrow).

Figure 2 Transarterial embolization images. A: A large tumor stain in the lateral segment of left lobe (arrows); B: Post-embolization angiogram showing no remained tumor stain.

Figure 3 Pathologic findings. A and B: Atypical cells forming solid sheets filled with RBCs (HE stain, × 200, × 400, respectively); C and D: Immunohistochemical staining for CD31 and CD34 showing diffuse strong positive expression (× 200, × 400, respectively).