A mitral blood cyst causing stenosis in the left ventricular outflow tract: A case report

Intracardiac blood cysts are commonly observed in the autopsies of fetuses and infants. Most patients are below six months of age, and most cysts spontaneously regress with aging. Intracardiac blood cysts are rarely described in children and adults. A nine-year-old girl was admitted to our clinic with atypical chest pain. Echocardiography revealed a cystic formation on the anterior mitral leaf let. The cyst caused the obstruction of the left ventricular outf low tract. The patient was evaluated by a multidisciplinary team, and surgical intervention was decided. After cyst resection, the mitral valve did not require further intervention. Histopathological examination confirmed that the cyst was a mitral blood cyst. The patient was discharged without any postoperative complications.