Abstract
A 47-year-old man was referred to our hospital for the evaluation of a retroperitoneal tumor. The tumor 4 cm in diameter was located in the retroperitoneal space, on the left of the abdominal aorta. Computed tomography (CT) showed an enhanced solitary tumor and magnetic resonance imaging (MRI) showed a mass of iso intensity to the muscle on T1-weighted image, and of slightly high intensity on T2-weighted image. Positoron emission tomography showed abnormally high uptake of FDG in the tumor. The tumor was resected with laparoscopic surgery for the purpose of diagnosis and treatment. The operative time was 250 minutes and the total volume of bleed loss was 80ml. Histopathological diagnosis of the tumor was Castleman disease, hyaline-vascular type. Castleman disease is a benign lymphoproliferative disease first reported by Dr. Benjamin Castleman in 1954. Castleman disease most commonly affects the head, neck or mediastinum, and rarely affects the retroperitoneum. Although the tumor was hypervascular, we could easily identify and treat the feeding vessels to the tumor by magnifying under laparoscopy and perform minimally invasive surgery.
