To report two cases of multicentric Castleman's disease involving the orbital area.

A 52-year-old man presented with discomfort of the right eye on eyeball movement that began 4~5 months ago. He had been diagnosed as Castleman's disease upon the biopsy of his neck lymph nodes 2 years ago. Proptosis was found in his right eye, and orbital computed tomography revealed an enlarged mass in the inferior orbit compared to the former image. An incisional biopsy confirmed Castleman's disease. A 57-year-old man presented with left eyelid swelling that began 3 months ago. Orbital and chest computed tomography revealed a mass in the left superotemporal orbit and the enlarged lymph nodes of the mediastinal area. Castleman's disease was confirmed by biopsy of the lymph nodes in the mediastinal area.

Steroid therapy was prescribed for the 52-year-old man. The 57-year-old man was placed under close observation.