Fibromyxoid nephrogenic adenoma protruding in a renal cortical cyst. A rare morphological variant in an outstanding location

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• 作者：Radia Khedaoui ; MD ; ^{radia.khedaoui@salud.madrid.org" class="auth_mail" title="E-mail the corresponding author} ; Beatriz Encabo ; MD ; Juan C. Tardí ; o ; MD ; PhD
• 关键词：Nephrogenic adenoma ; Fibromyxoid nephrogenic adenoma ; Renal cortical cyst ; Renal tumor
• 刊名：Pathology - Research and Practice
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：212
• 期：2
• 页码：135-138
• 全文大小：2576 K

文摘

Nephrogenic adenoma (NA) is an unusual, benign lesion of the urinary tract, generally presenting in the bladder and with less frequency in the renal pelvis, urethra or ureter. It consists of tubules, microcysts and papillae lined by a single layer of low cuboidal epithelium without atypia. Recently, a fibromyxoid variant mimicking an infiltrating mucinous adenocarcinoma has been described. We report hereby the case of a 70-year-old female with a fibromixoid NA protruding in a renal cortical cyst. Only one case of NA in a renal cortical cyst has been found in the literature and it was of the classical type. The development of a NA in a renal cortical cyst lends support to the theory that the NA results from proliferation of secondarily implanted exfoliated renal epithelial cells.