Fig. 2

Cytology of the peritoneal effusion (a); specimen obtained from ultrasound-guided fine-needle aspiration (b); histopathology of the specimen obtained from laparoscopy-guided Tru-cut biopsy (c), and that of peritoneal nodules collected at necropsy (d). a Small focus of large epithelioid cells is seen, with background comprised of large numbers of erythrocytes (Giemsa). The cells are large and have a round to oval-shaped nucleus. b Large epithelioid cells are seen together with large numbers of erythrocyte (Giemsa). The cells have a large round to oval-shaped nucleus. The cytoplasm is clear and/or has some vacuoles. c Cubical or columnar cells, which resemble mesothelial cells, align and form papillary structures (HE). d There are epithelial linings of cubical or columnar mesothelial-like cells with some nuclear debris and pale eosinophilic stroma (HE). Bars = 250 μm (a, b) and 50 μm (c, d), respectively