肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)是罕见的肾肿瘤,曾称为成人中胚层细胞肾瘤[1]或肾盂囊性错构瘤等。1998年Michal等[2]首次以肾良性混合性上皮间质肿瘤命名。1临床资料患者女性,43岁。体检发现左肾占位入院。查体:左肾区隆起,压痛和叩击痛(+);双侧输尿管行 Mixed epithelial and stromal tumor of the kidney (MESTK) is a rare renal tumor that has been referred to as adult mesodermal neoplasia [1] or renal cystic hamartoma. 1998 Michal et al [2] for the first time named benign mixed neoplastic mesothelioma tumors. 1 Clinical data Patient female, 43 years old. Physical examination found left kidney occupancy hospitalization. Physical examination: left kidney area uplift, tenderness and percussion pain (+); bilateral ureteral line