Tabriz University of Medical Sciences Journal of Cardiovascular and Thoracic Research 2008-5117 11 1 2019 03 16 Cardiac hydatid cyst: A rare presentation of echinococcal infection 75 77 10.15171/jcvtr.2019.13 EN Ata Firouzi Mohsen Neshati Pir Borj https://orcid.org/0000000323422743 Alireza Alizadeh Ghavidel Journal Article 10.15171/jcvtr.2019.13 2018 11 02 2019 03 11 A 57–year-old man presented with atypical chest pain. Transthoracic echocardiography was performed and revealed a very large and well defined intra-myocardial multicystic mass in the posterolateral and basal inferoseptal segments of left ventricle suggestive of hydatid cyst. Although the echocardiographic diagnosis was straightforward, serologic test (hydatid cyst antibody) with enzyme-linked immunosorbent assay (ELISA) was performed which was positive for echinococcal infection. Other works up showed no involvement of other organ system. Albendazol was started for him and he referred to cardiac surgeon for resection of cystic mass.