Tubular Adenomatous Metaplasia (Nephrogenic Adenoma) of the Female Urethra

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Abstract
We present a case of tubular adenomatous metaplasia (nephrogenic adenoma) arising within a urethral diverticulum in a woman complaining of a vaginal mass with dyspareunia. This lesion, which uncommonly affects the urethra, may clinically manifest as a gynecologic condition and a mimic a low-grade adenocarcinoma on pathologic assessment. Criteria for diagnosis and current concepts of pathogenesis are discussed. Our findings, including an immunocytochemical work-up, support the concept of a reactive metaplastic response rather than nephrogenic differentiation.

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