[A XXXX that grew gradually over five years].

@entity1 @entity1358 @entity2 @entity5
A 38-year-old @entity1 was found to have an abnormal shadow in his chest X-ray film during a general medical examination. A nodule with a homogeneous density and a clear margin was seen in the upper lobe of the right lung. Since this shadow gradually enlarged during a five-year follow-up period, he was admitted to our hospital. Chest contrast and dynamic CT scans and aortography showed characteristics of a @entity5 with somewhat rich vascularity. The doubling time of this @entity5 was about 430 days. Transbronchial brushing for cytologic study and a transbronchial biopsy showed no @entity5 . However, the @entity5 was surgically resected because of its gradual growth over the five years. The resected @entity5 was histologically diagnosed as a @entity2 . This disease was first described by Leibow and Castleman in 1963, as a @entity5 similar to @entity1358 . This disease is extremely rare and only 61 cases have been reported: twenty cases, including the present case, in Japan and 41 in other countries.
