Cardiac hemangiomas are rare tumors, the presence of these neoplasms in heart valves is an exceptional finding, mainly because of their histological features. Normally, transesophageal echocardiography is used to establish a diagnosis of cardiac tumor, though careful interpretation is needed to avoid diagnostic errors. Herein is described an unusual presentation of a primary hemangioma of the mitral valve which was diagnosed as a prolapsing left atrial myxoma. The patient underwent successful surgical excision of the neoplasm, followed by mitral valve repair.

Resection of a large atrial hemangioma using a bloodless surgical technique: a case report. Heart Surg Forum. 2007;10(1):E87-9.

We present a biatrial hemangioma in a Jehovah's Witness patient. Hemangioma is extremely rare, accounting for 1% to 2% of benign cardiac tumors. Complete resection of a large hemangioma is mandatory due to its potentially life-threatening risk. In Jehovah's Witness patients, it is necessary to employ bloodless surgery protocols to maximize the patient's outcome. Our patient had undergone 6 weeks of monitoring and erythropoietin therapy prior to surgery, raising her hemoglobin level from 11.6 g/dL to 16.8 g/dL. Intraoperative bloodless surgical protocols as well as a continuous blood circuit were utilized. The patient's hemoglobin level on postoperative day one was 14.5 g/dL; one year postsurgery, the patient was symptom free.

Right ventricular cavernous hemangioma: a rare cardiac primary neoplasia. Ital Heart J Suppl. 2005 Aug;6(8):498-501.

Primary neoplasia of the heart is rare and often diagnosed postmortem (with a prevalence < 0.2% at postmortem examinations) due to the lack of specific clinical symptoms and signs. Among benign cardiac tumors, cavernous hemangioma has a prevalence of 2.8%. Less invasive diagnostic techniques such as transthoracic echocardiography allow for the diagnosis to be made during life with definitive surgical treatment. We report a representative case of right ventricular cavernous hemangioma, which mimicked right ventricular failure associated with systolic pulmonary flow tract obstruction. Surgical treatment was indicated for symptom severity and for the unpredictable behavior of the large neoplasm.