We present a case of hepatosplenic sarcoidosis. Splenic lesions were detectable by both MRI and dynamic CT. They were demonstrated as multiple low signal intensity lesions on T2-weighted images obtained by MRI and as low density lesions by dynamic enhanced CT. Hepatic focal lesions were not apparent on CT or MRI. After steroid therapy, both dynamic enhanced CT and MRI showed disappearance of the splenic lesions. These are valuable modalities for detecting focal splenic sarcoidosis and evaluating the effect of steroid therapy.