PMC4936466_01
(a) Low-power view showing cystically dilated glands deep in the muscularis propria (hematoxylin and eosin, x50). (b) High-power view showing benign, mucinous glands in the muscle layer (hematoxylin and eosin, x400). (c) Low-power view showing cystically dilated mucin-positive glands deep in the muscularis propria (Periodic acid-Schiff [PAS], x50). (d) Medium-power view of the mucosal glands showing foci of goblet cell metaplasia (Alcian Blue : PAS, x200)
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The histopathology of the resected mass lesion showed irregular proliferation of a few mucinous cystically dialted glands lined by bland epithelial cells with abundant cytoplasm and basally located nuclei, intermixed with hypertrophied smooth muscle fibers reaching up to the deep muscle layer in the wall [Figure 1a-d].