What is pseudocyst complication of chronic pancreatitis?

A collection of pancreatic fluid surrounded by a wall of normal granulations and fibrous tissue, usually persist > 6 weeks. Natural Hx : For acute pseudocyst (or <6wk) : 40% solve spontaneous , 20% dev. Complication For Chronic pseudocyst (7wk up) : about 5 % solve spon. , 50-60% dev. Complication No malignant potential : af <6cm/asymp. No complication : ไม่ต้อง surviellance