A 65-year-old female visited our hospital following suspicions of a tumor in the pancreas. Abdominal CT revealed a hypervascular tumor 24 mm in diameter in the pancreatic body. Endoscopic ultrasound (EUS) revealed a low echoic tumor with strong blood flow signal. The calcification, thick capsule, cysts could not be seen in the tumor. Following the diagnosis of a neuroendocrine tumor, distal pancreatectomy was performed. The resected specimen showed a small fibrous sponge-like structure and revealed several small cysts. Histological findings confirmed the diagnosis of serous cystic neoplasm (SCN) .
SCN is characterized by a honeycomb appearance. However, in cases like ours where the cystic component is minimal, it is difficult to confirm the diagnosis prior to tumor resection. In such cases, strong blood flow signal by the Doppler EUS is considered an important finding.
