Conclusion: Metanephric adenoma is a renal benign tumor, Mastering the clinical features and histopathological character of metanephric adenoma will help to diagnosis.

• 后肾腺瘤预后较好。结论：后肾腺瘤是一种罕见的肾脏原发上皮源性肿瘤，了解该肿瘤临床及病理特点有助于鉴别其他易于混淆的肿瘤类型。