Splenic hamartoma in an 8- year- old boy was found during examination. (A) Abdominal ultrasonography showed an isoechoic oval-shaped mass (arrow) in the mid-portion of the spleen; (B) Non-enhanced CT showed a slightly lower-density mass (arrow) in the spleen. (C) Contrast-enhanced CT scan shows mild diffuse heterogeneous enhancement in the arterial phase. Magnetic resonance imaging (MRI) showed a hypointense mass (arrow) on the T1WI image (D) and a slightly hyperintense mass in the T2WI image (E). (F) The lesion (arrow) shows moderate enhancement on gadolinium-enhanced MRI.