Abstract
A 49-year-old woman presenting with an upper abdominal tumor was referred to our hospital. The tumor was detected during routine abdominal ultrasonographic examination at another hospital and had been followed with a diagnosis of an adrenal tumor. Ultrasonography and abdominal CT scan performed at our hospital revealed a tumor located in the greater omentum, measuring 3 cm in diameter. Preoperative reexamination 6 months later did not show any remarkable changes. Laparotomy for the resection of the tumor was performed. Histopathologic findings of the resected tumor led to the diagnosis of Castleman's disease (hyaline vascular type).
Preoperative diagnosis of intraabdominal tumors is difficult and they are diagnosed after surgical treatment in most cases. Among of those tumors, Castleman's disease is rare, but it should be included in the differential diagnosis of abdominal tumors. After complete resection of the tumor, the prognosis of unicentric Castleman's disease is good. However, long-term careful observation is recommended because postoperative occurrence of malignant lymphoma or recurrence of Castleman's disease has been reported.
