PMC7481495_01
Axial CT imaging showed a large multi-cystic intra-abdominal mass in the right abdomen spanning from the porta hepatis to the right lower quadrant.
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Computerized tomography (CT) demonstrated a multi-cystic abdominal mass located near the porta hepatis (Fig. 1) along with multiple low-attenuating peritoneal nodules.
Multi-loculated cystic surgical specimen measuring 26 x 18 x 8 cm filled with serous fluid.
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Grossly, the abdominal mass specimen, measuring 26 x 18 x 8 cm, showed multi-loculated cysts filled with serous fluid (Fig. 2).
Multi-cystic peritoneal mesothelioma with vascular congestion, HE staining x20 (A) and x40 (B).
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On immunohistochemistry, tissue from the large cystic mass stained positive for calretinin, CK4/5, CK7, and D2-40 (Fig. 3, Fig. 4, Fig. 5).
(A) Calretinin immunohistochemical staining. (B) CK 5/6 immunohistochemical staining.
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On immunohistochemistry, tissue from the large cystic mass stained positive for calretinin, CK4/5, CK7, and D2-40 (Fig. 3, Fig. 4, Fig. 5).