A rare presentation of hydatid cyst, involvement of uncommon sites with sparing of typical locations.

Hydatid cyst (HC) is a serious health problem in endemic areas. Liver and lung are the most common involved organs while the involvement of muscles, heart, kidney, brain, and spleen is rare. The involvement of these rare locations for HC is mostly in association with infestation of common sites. We report a case of 43-year-old man with a history of surgery of HC in brain and heart who complained from chest pain. In imaging modalities, three cystic lesions were seen in heart and kidney which were confirmed to be recurrence of HC by serologic tests. However, no evidence of involvement of liver and lungs as the most common infected organs of HC was seen in recent and previous imaging mo®dalities. The patient refused another surgery and just accepted anthelmintic drugs. The practical point of this case report is that when we see any cystic lesion in imaging modalities in uncommon sites for HC, while common sites are spare, we should still consider the possibility of HC and not rule out it just because of lack of simultaneous infestation of its common involved organs.