Right atrial blood cyst of a patient with hypertrophic cardiomyopathy

Intracardiac blood cysts are generally observed in infants and regress spontaneously with time. Blood cysts are mainly located on the left side of the heart and atrioventricular valves. These findings are extremely rare in older children and adults. We report a rare case of a 45-year-old female patient with a cardiac blood cyst in the right atrium and hypertrophic obstructive cardiomyopathy. To the best of our knowledge, this is the first-ever case report in the literature of blood cyst and hypertrophic cardiomyopathy.