Hydatid disease with unusual localization

Hydatid disease (HD) may develop in almost any part of the body. The liver is the most frequently involved organ (75 %), followed by the lung (15 %) a nd the remainder of the body (10%). Hydatid cysts with unusual localization s may cause serious problems in the differential diagnosis. In this article the various imaging findings of hydatid cysts with unusual localizations a re reviewed, based on our experience. Findings in brain, heart, pericard, k idney, intraperitoneum, retroperitoneum, bone, soft tissue, and breast are discussed. Hydatid disease should be considered in the differential diagnos is of cystic masses in all anatomic locations, especially when they occur i n areas where the disease is endemic. The combination of clinical history, imaging findings, and serologic test results usually help the diagnosis.