Castlemanʹs disease of the axilla mimicking metastasis

Castlemanʹs disease is an unusual inflammatory lymphoproliferative disorder of unknown cause. It most commonly occurs in the mediastinum but rarely in the axillary lymph nodes. We report a case of localized axillary Castlemanʹs disease mimicking metastasis as the patient had a palpable malignant mass in the breast, described by ultrasonography, color Doppler ultrasonography, contrast-enhanced CT, and dynamic enhanced breast MR images.