Huge cystic lymphangioma involving the entire breast.

We report a case of a 31-year-old female who required mastectomy with the diagnosis of cystic lymphangioma of the entire left breast. We tried operative management that is not mastectomy since it was not malignant, but finally mastectomy was needed. In reduction mammaplasty patients, plastic surgeons should consider cystic lymphangioma as a differential diagnosis of unilateral large breasts.