Primary hydatid cyst of the breast with elevated CA 19-9 level.

Breast masses secondary to hydatid cyst disease are placed on the differential diagnosis of breast tumors under guidance of the literature. In addition to their characteristic appearance on mammography, many specific parameters for diagnosis are required. In this report, the relation of serum CA 19-9 levels to the primary breast cyst hydatid was evaluated in both preoperative and postoperative periods.