Milk of Calcium in a Pyelocalyceal Diverticula-Endoscopic Management and Review of Literature

Milk of Calcium (MOC) refers to a colloidal suspension of calcium salts. The occurrence is rare and it has been reported to occur most commonly in pyelocalyceal diverticula of Kidneys. Cases of MOC in gall bladder and breast has also been reported. MOC has distinct features on X-Ray, Ultrasonography and Computed Tomogram (CT). The MOC cysts of kidneys are frequently mistaken for renal stones on X-rays and could arise suspicion of a complex renal cyst on CT. In this report, we describe the endoscopic management (Flexible Ureteroscopy with laser) of a case of MOC in a pyelocalyceal diverticulum, presenting with loin pain, with its review of literature.