Renal hilar extramedullary hematopoiesis presenting as incidental unilateral renal hilar mass in adolescent male: a case report

Extramedullary hematopoiesis (EMH) is a response to erythropoiesis failure in bone marrow, and is mostly encountered in the liver and spleen. Renal involvement is rare and the radiological literature on renal EMH is scant. We report the computed tomography (CT) and magnetic resonance imaging (MRI) findings of one such rare case of renal EMH in a young boy, appearing as a unilateral renal hilar mass.