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Hydatid Cyst of the Breast Mimicking Inflammatory Carcinoma and Mastitis

Hydatid cysts are caused by the larval form of Echinococcus granulosus. Humans are accidental intermediate hosts of this organism. Although most prevalent in sheep-raising countries, hydatid cysts have a worldwide distribution. They can develop in almost all organs of the body. 1-7 Because they are very uncommon in the breast, differential diagnosis is not usually considered until histopathologic diagnosis. 8 In this report, a hydatid cyst located primarily in the breast, which caused difficulty in differential diagnosis, is discussed in light of data in the literature.