What are contraindications for surgery in chronic pancreatitis?

Occlusion of SMV and PV Chronic Pain from other cause Inadequate Medical Treatment For Resection Procedure & Hybrid Procedure (Frey&Beger Procedure) Unable to cope Apancreatic DM (Brittle DM) : Relative For Drainage & Hybrid Procedure (Frey & Beger Procedure) Cannot exclude Pancreatic malignancy For PPPD s/p Vagotomy Hx of Severe PU(peptic ulcer)