PMC5562102_01
Abdominal CT scan showing the presence of a cystic tumor of 7 cm with a component tissue developing at the expense of the stomach, with enhancement after contrast injection.
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Tumor consisted of mesenchymal component made of oval cells arranged in cords, tubules and epithelial component arranged in glands (hematoxylin eosin X 200).
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The tumor consisted of two components - mesenchymal and epithelial (Fig. 2).
Mesenchymal component consisted of oval cells with scant cytoplasm and monomorphic nuclei (HE X 400).
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The predominant component was mesenchymal, consisting of ovoid cells arranged in layers, with regular nuclei and scanty cytoplasm (Fig. 3).
Epithelial component showed glands lined by cubo-cylindrical cells (HE X 400).
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The epithelial component was focally distributed, consisting of lightly-reduced glands, lined by cuboidal to columnar cells with atypical hyper-chromatic nuclei and infrequent mitosis (Fig. 4).
Immunohistochemistry: positivity of neoplastic cells with vimentin (A), CD99 (B) and focal positivity with CD10 (C) (X 200).
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On immunohistochemistry, the tumor was uniformly positive for vimentin, CD 99 (Mic 2) and focally positive for CD 10 (Fig. 5).