[A case of hamartoma of the retroperitoneal space]

A case of hamartoma of the retroperitoneal space in a 59-year-old woman is reported. Excretory urography, computed tomography and adrenal angiography revealed a tumor with multiple calcification in the left retroperitoneal space. The tumor measuring 6.5 by 3.5 cm, and weighing 30 gm, was removed operatively. Removed specimen consisted of many cysts of various sizes containing mucous fluid and multiple small stones. Microscopically, the tumor was composed of a tubular structure lined by ciliated, epithelium-like tissue of the respiratory system or that of Fallopian tube. These tubules were occasionally dilated cystically. No atypical cells were found. The postoperative course was uneventful.