Giant sporadic renal angiomyolipoma as a cause of a massive abdominopelvic mass: A case report

Rationale: Renal angiomyolipoma (RAML) is a benign solid tumor that is typically small and asymptomatic. We present a rare case of a giant sporadic RAML to contribute to the understanding of the diagnosis and management of massive abdominopelvic masses. Patient concerns: A 35-year-old woman was admitted to our hospital after a magnetic resonance imaging scan at a local county hospital revealed a massive abdominopelvic mass. She had previously undergone vaginal delivery and had no significant medical history. Diagnoses: Physical examination revealed a large, firm, fixed mass in the left abdomen and pelvis. An abdominal computed tomography scan confirmed the presence of a massive tumor originating from the left kidney. Postoperative histopathological examination confirmed the diagnosis of RAML. Interventions: The tumor was successfully resected via open radical nephrectomy with minimal blood loss following preoperative arterial embolization. Outcomes: The patient recovered well and reported no postoperative complications during follow-up. Lessons: Sporadic RAMLs exceeding 30 cm in size are exceptionally rare. This case demonstrates the successful surgical management of a giant RAML causing a massive abdominopelvic mass, with controlled bleeding due to preoperative embolization. Additional case reports are necessary to refine treatment approaches for giant RAML.