Giant solitary fibrous tumor arising from greater omentum

Figure 1 Abdominal computed tomography demonstrating a giant solitary tumor of 15. 8 cm × 21.0 cm in abdominal cavity.

Figure 2 Giant tumor. A: A giant tumor originating from greater omentum; B: A giant tumor originating from resected specimen.

Figure 3 Hematoxylin and eosin stained sections. A: Collagen deposition, 10 cm × 10 cm; B: Abundant spindle cells, 10 cm × 10 cm; C: Branching vessel, 10 cm × 20 cm; D: Nuclear atypia, 10 cm × 20 cm.

Figure 4 Immunohistochemical test. Immunohistochemical test showing the tumor was positive for CD34 (A), bcl-2 (B), α-smooth muscle actin (C), and vimentin (D) (10 cm × 20 cm).