The subphrenic space is a common site for what?

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This item tests knowledge of peritoneal spaces and where free fluid or infection tends to localize in the upper abdomen. The subphrenic space lies between the diaphragm and the liver on the right, and between the diaphragm and the stomach/spleen on the left. It’s a gravity-dependent, relatively large potential space, so fluid from infection, postoperative leakage, or a perforated viscus tends to collect there. Because of this gravity effect and its proximity to the liver, subphrenic accumulations—such as abscesses or other fluid collections—are a common finding. Other options involve structures or conditions not specific to this space: kidney stones are in the urinary tract, gas is typically in the bowel or as free intraperitoneal gas after perforation, and liver tumors occur within liver tissue rather than in the subphrenic recesses.