Authors reviewed mammographic ultrasonographic and MRI findings a patient with breast cysticercosis, which wasoperated and pathologically proved. mammography showed a 1cm sized round radioopaque lesion with curvilinearcalification, which was located near the pectoralis major muscle. Ultrasonografic findings showed heterogenoushypoechoic cystic lesion with internal hyperechoic nodule and posterior acoustic shadowing. T2WI and protondensity image MR image showed low signal intensity with cresentic high signal intensity portion. 2D-FLASH dynamicMRI showed intermediate signal intensity and peripheral signal void area, which was not enhanced with Gd-DPTA. Thepossibility of cysticercosis can be considered be considered when a cytic lesion is discovered near the pectoralismuscle in a patient living in an endemic area.