Ruptured right atrial hydatid cyst causing anaphylactic shock in a child: a rare and life-threatening case.

Hydatid cyst is an infectious disease that occurs in humans due to infection of Echinococcus granulosus larvae. Although cardiac hydatid cysts are rare, right atrial localisation is even rarer. The aim of this article is to emphasise the importance of always being alert and prepared for the risk of anaphylaxis developing due to cyst rupture in paediatric patients with isolated cardiac hydatid cysts, to initiate oral albendazole treatment immediately upon diagnosis, to underline the importance of surgical timing, and to discuss the role of clinical assessment and imaging methods in predicting of cyst rupture.