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Benign Omental Hemangiopericytoma Presenting with Hemoperitoneum: Radiologic Findings

Department of Radiology, University of Perugia, Via Brunamonti 51, Perugia 06122, Italy.

View larger version (122K): [in a new window]   Fig. 1A. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. Unenhanced MDCT scan shows soft-tissue, well-circumscribed mass with small amount of free fluid in rectovesical pouch compatible with hemoperitoneum.

View larger version (126K): [in a new window]   Fig. 1B. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. Contrast-enhanced CT scan shows rapid and centripetal opacification of lesion in arterial phase.

View larger version (127K): [in a new window]   Fig. 1C. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. On contrast-enhanced CT scan, enhancement is homogeneous during venous phase with same attenuation values as iliac vessels.

View larger version (91K): [in a new window]   Fig. 1D. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. Three-dimensional maximum-intensity-projection image shows long vascular pedicle originating from splenic hilum included in omental tissue adjacent to epigastric vessels.

View larger version (92K): [in a new window]   Fig. 1E. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. Angiogram shows dense accumulation of contrast medium owing to filling of fine vessels early in arterial phase.

View larger version (120K): [in a new window]   Fig. 1F. —24-year-old man with abdominal pain in left lower quadrant and mild anemia. Surgical specimen is oval-shaped, red-brown tumor with soft-cut surface and periferical vascular spaces of varying size.

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