Castlemanʹs disease arising from the accessory spleen: Ultrasonography, computed tomography, and magnetic resonance imaging findings

Castlemanʹs disease is a rare lymphoproliferative disorder of unknown etiology. To our knowledge, Castlemanʹs disease arising from the accessory spleen has not been reported in the literature. We report the case of localized Castlemanʹs disease arising from the accessory spleen in a 34-year-old woman and discuss the characteristic findings of ultrasonography (US), computed tomography (CT), and magnetic resonance (MR) imaging.