Cystic lymphangioma are rare benign tumors that originate as a congenital anomaly of the lymphatic system. Their common presentation is in neck and axillary area at the birth, during infancy or early pediatric age group. Author reports an unusual case of cystic lymphangioma of breast which was diagnosed in a 32-year-old woman. The findings were very dense, sharply defined, and multilobulated masses on mammography, and mu-Itiloculated echo free lesions on ultrasonogram.