Retroperitoneal leiomyosarcoma: a rare cause of adrenal pseudotumor on CT and MRI

Numerous causes of adrenal pseudotumors have been previously described based on computed tomography findings, (CT) with normal anatomical structures being more common causes than extraadrenal neoplasms. This case describes a rare retroperitoneal tumor: a primary vascular leiomyosarcoma arising from the renal hilus, which mimicked an adrenal malignancy on CT and magnetic resonance imaging.