Presentation
Left flank pain
Patient Data
Age: 40 years
Gender: Male
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/63063/annotated_viewer_json?_c=1683741421\u0026iframe=true\u0026lang=gb"}
The left kidney shows a middle zonal partially exophytic renal cyst measuring 4 cm, showing dependent dense calcific precipitate (milk of calcium). This density increases in the delayed phase by excreted contrast accumulation. Thread-like connection to the middle calyx that may be the diverticular connection or a compressed nearby minor calyx.
Case Discussion
The radiological features are representing mostly renal milk of calcium within a renal cyst in non-contrast phase. In excretory phase, the accumulation of contrast within the cyst augmenting the size of the dependent density represents a communication to the renal calyceal system and so it is considered as a calyceal diverticulum.