| Adenomatoid Tumor
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Etiology
•Unknown.
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Pathogenesis
•Unknown. The tumor is believed to be mesothelial in origin.,
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Epidemiology
•Males, mean age is 36 years.
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General Gross Description
•The majority of epididymal adenomatoid tumors are less than 2 cm in diameter and are attached to the surface of the epididymis.
•The tumors appear solid and tan on cut surface.
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General Microscopic Description
•Histologically the tumor shows an epithelioid component appearing as strands and cords and defines gland-like or vascular-like spaces.
•The cells may have a flattened appearance or may appear cuboidal.
•On immunoperoxidase stains these cells are keratin positive and negative for factor VIII and CD34.
•Electron microscopy shows abundant long delicate microvilli on the luminal surface of the tumor cells.
•Adenomatoid tumors are believed to be basically benign mesotheliomas.
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Clinical Correlation
•Adenomatoid tumors may be noted by the patient or physician as a non-painful nodule of the testis.
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References
•Urological Pathology. Murphy WM (ed). Philadelphia: Saunders, 1989, pp. 367.
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| Adenomatoid Tumor
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| Synopsis by: Harold Yamase M.D. (T79100M90540)[486]
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