尿管白板症の2例(尿管cholesteatoｍaの1例)

Abstract

Two cases of ureteral leukoplakia which are the sixth an d seventh recorded cases in the domestic and foreign literatures on this subject were reported. In the first case the leukoplakial change was ob s erved at the site of existance of a giant ureteral stone. The development of leukoplakia was supposed to be caused by chronic irritation from the stone. The second case revealed laminated deposit of keratin at the site of the leukoplakia and was found to be the second recorded case of ureteral cholesteatoma. Histologically the first case was a incomplete type demonstrating high content of glycogen in the intercellular space of the stratum spinosum, while the second case was a complete type showing less glycogen content. In the second case the plain roentgenogram demonstrated a specific calcified picture corresponding to the ureteral fold at the site of the leukoplakia.