Cystic density shadow adjacent to the leptomeninges of the head of the pancreas, which is a description of a lesion within the pancreas on ct. Possible causes of this condition include pancreatic pseudocysts, simple epithelial cysts, intraductal papillomas, cystadenomas, and pancreatic cancer. 1. Pancreatic pseudocyst: Pancreatic pseudocyst is a cyst-like accumulation of fluid in the pancreas that occurs after acute pancreatitis. 2. Simple epithelial cysts: simple epithelial cysts are caused by congenital development, commonly found in children, and most of them are mucus. 3. Intraductal papilloma: Intraductal papilloma is an intraductal lesion of the pancreas that grows along the duct, causing localized blockage and fluid accumulation. 4. Cystadenoma: Cystadenoma is a cystic solid lesion with septal and wall nodules, and some patients have Lindau’s syndrome. 5. Pancreatic cancer: Pancreatic cancer is a common malignant tumor of the pancreas, with unclear borders, which leads to dilatation of the pancreatic duct after involvement. If you find cystic density shadow next to the pancreatic head hook, you should seek medical treatment in time, make a clear diagnosis after further examination, and carry out standardized treatment under the guidance of doctors.