Which organs are found in the anterior perirenal space?

The anterior perirenal space, which is a part of the retroperitoneal compartment, contains structures that are closely associated with the kidneys and their supporting structures. This space primarily encompasses the area around the kidneys, but it also includes surrounding structures such as the pancreas.

Option B is correct because the retroperitoneal portion of the intestines, including parts of the descending and ascending colon, may also be found in proximity to the anterior perirenal space, along with the pancreas, which is indeed retroperitoneal. This distinction is important because the anterior perirenal space primarily reflects the relationship of these structures to the kidneys in the retroperitoneum.

The other options encompass structures that either do not belong in the anterior perirenal space or are not found in the same anatomical relationship. For example, the liver and gallbladder are located in the upper right abdomen but do not lie within the retroperitoneal space. The kidneys and ureters, while integral to renal function, do not accurately describe what is in the anterior perirenal space specifically, as this space relates more broadly to surrounding supportive structures. Lastly, the rectum and bladder are found in the pelvic cavity rather than the anterior perirenal space,