Milk of calcium renal stone: a case report.

A case of milk of calcium renal stone was reported. It is an unusual condition in which there is suspension of calcium salt within a pyelogenic cyst. The diagnosis is difficult because of its rarity. Reviewing literature, plain abdominal X-ray in different positions were emphasized. We found that fluoroscopy with spot films in different positions is worthwhile. It has to be differentiated from gallstone and also from usual renal stone. Conservative treatment is advised if there is no suggestive malignancy.