[Blood cyst of the pulmonary valve in an adult--a case report].

Blood cysts of the heart valves are commonly reported at postmortem examination of infants but are rare seen in older children and adults. A 42-year-old woman was referred to our hospital for cardiac evaluation because of dyspnea on exertion and heart murmur. There was no history of cyanosis or cardiac failure. Cardiac catheterization revealed valvular pulmonary stenosis and atrial septal defect. Right ventricular angiography showed the circular filling defect 0.7 x 0.7 cm in size at the suprapulmonary valve. However, this preoperative abnormal finding was diagnosed as a blood cyst after surgery. At operation a blood cyst originating from the right cusp of the pulmonary valve was found and resected, and was followed by commissurotomy of the pulmonary valve and direct closure of the atrial septal defect. Her postoperative course was uneventful.