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Adenomatoid Tumor

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The tumor is composed of low cuboidal or flattened cells arranged in solid cords, nests, glandular spaces, or slit-like tubules within a fibrous stroma. The cells have a small vesicular nucleus lacking any appreciable atypia, punctate nucleolus and eosinophilic cytoplasm. Intracytoplasmic vacuoles may be prominent and create a resemblance to signet ring-cells or fat cells. Differential diagnosis of adenomatoid tumor includes: metastatic carcinoma, malignant mesothelioma, and carcinoma of the rete testis.

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