![]() The sonographic characteristics of the crus are different from those of the adrenal gland thus, this pseudo exception can be avoided by careful inspection. ![]() Nine cases (50%) appropriately showed the linear or lying-down adrenal gland 6 (33%) showed an exception to the rule, with a normally shaped adrenal gland and 3 (17%) showed a pseudo exception in which the adrenal gland was linear but blended with the diaphragmatic crus to simulate a triangular adrenal gland. This series looked at 18 cases of an empty renal fossa in fetal, neonatal, and pediatric patients and recorded the shape of the adrenal gland. There are exceptions to this rule whereby a kidney is missing from the renal fossa, yet a normal adrenal shape is present. It is theorized that the presence of the kidney in the normal location within the renal fossa is important for the formation of the normal triangular inverted V or Y adrenal shape. ![]() ![]() A linear-shaped or “lying-down” adrenal gland is a sign often seen with the absence of the kidney in the renal fossa due to renal agenesis, renal ectopia, or horseshoe kidney. ![]()
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