One Patient, a 38-year-old male, who had an abnormal shadow on the routine chest X-ray examination, was discovered. He was clinically asymptomatic and no abnormalities were obtained on the laboratory studies. Under the diagnosis of probable neurogenic tumor, a thoractomy was performed. Finally, a histologic diagnosis of Castleman's lymphoma (hyaline-vascular type) was made.
One hundred and twenty-two cases from the Japan literature were reviewed. The age of the patient ranged from 6 to 62 years, and there appear to be no paticular sex preference. The 70 of 123cases (57%) of the lesion was located in the thorax, but only 4 cases arising from posterior mediastinum is reported, including our case.
The charactaristics of medical imagings were as follows : They were revealed 1) well-circumstanced and homogeneous shadow, at Chest radiograph, 2) positive accumulation at Scintigraph of 67 Ga-citrate, 3) regular distribution of densities with clear out-line and diffuse enhancement after contrast materials at CT, and 4) hypervascularity at Angiograph.
