Abstract
The patient was an 11-year-old boy who suffered from acute lymphoblastic leukemia. After chemotherapy with L-asparaginase, he developed a pancreatic pseudocyst after acute pancreatitis that became enlarged and suppressed his stomach. Occasionally, the capsule of a pancreatic pseudocyst does not possess a true epithelial lining and is surrounded by fibrosis tissue filled with pancreatic debris, necrotic tissue, enzymes, blood, and fluids. Such pseudocysts should be drained by such techniques as surgical drainage, endoscopic drainage, and percutaneous drainage. We successfully perfomed cystgastrostomy for external drainage of the cyst with ultrasonic endoscopy. Endoscopic puncture seems to be useful as a treatment for pancreatic pseudocyst in children.
