Giant right atrial myxoma in pediatrics. Case report

Catalán Cabrera A.I.; Reyes Alban H.M.; Condori Alvino K.D.R.; Medina Durand M.K.; De la Cruz Hilario L.J.; Tamayo Huiza N. · Progress in Pediatric Cardiology (2025) · DOI: 10.1016/j.ppedcard.2025.101856

Resumen

Introduction: Myxoma is the most common benign cardiac tumor in adults; however, in children, it is less frequent than rhabdomyoma and fibroma. It shows a female predominance, with an incidence 1.5 to 2 times higher than in males. Only 22 % of myxomas develop in the right atrium, 2 % in the ventricles, and 1 % in the atrioventricular valve. Case report: We present the case of a 10-year-old patient admitted with obstructive symptoms with right heart failure. Diagnostic imaging, including chest X-ray, transthoracic echocardiography, and computed tomography, revealed a giant intracardiac mass. Surgical excision of the tumor was performed 48 h after admission, with favorable postoperative evolution. Histopathological examination confirmed the diagnosis of cardiac myxoma. Conclusions: Right atrial myxomas may present with dyspnea, syncope, ascites, and symptoms of right heart failure. Early diagnosis is crucial to prevent cerebrovascular events and allow for timely surgical treatment, thereby reducing preoperative and postoperative complications.