ケイ酸結石の1例

A CASE OF SILICA CALCULUS

緒言

　尿路のケイ酸結石はきわめて稀なものであるが，最近，われわれはケイ酸結石による尿路結石症の1例を経験したので，ここに報告する。

A 65-year-old female visited our hospital with the complaint of anuria in May, 1980. Retrograde pyelography suggested the presence of stenotic portion of the right lower ureter. The operation was car-ried out in May 30 and a calculus was found. Analysis of the calculus revealed the main composition of the calculus was silica. The patient had a past history of the gastric ulcer for which longterm MgSiO₂ was given as an anti-acid drug. It was thought that this was the cause of the caluculus. Silica stone was so rare that only 5 cases were reported in Japan.