Diffuse type autoimmune pancreatitis: the first case report in Thailand
Prachayakul, V.; Aswakul, P.; Apisarnthanarak, P.; Pongprasobchai, S.
Journal of the Medical Association of Thailand 95 Suppl. 2: S261-S264
2012
ISSN/ISBN: 0125-2208 PMID: 22574559 Document Number: 659826
Autoimmune pancreatitis (AIP) is a recently-recognized form of pancreatitis mimicking pancreatic cancer (PaC) but treatable with corticosteroid. There is one report of focal-type AIP in Thailand. Here we presented the first case report of diffuse-type AIP. A 76-year-old man presented with 10-day obstructive jaundice. Computed tomography (CT) showed obstructive jaundice from diffusely swollen pancreas, which had a characteristic capsule-like rim non-enhancement pattern of AIP. Serum immunoglobulin G4 (IgG4) was elevated of 468 mg/dL. Endoscopic ultrasound-guided fine needle aspiration demonstrated no PaC. Prednisolone 40 mg/day was started. Jaundice disappeared in 2 weeks and follow-up CT demonstrated normalization of swollen pancreas. Diffuse-type AIP does exist in Thailand. Recognition of this condition is critical to avoid misdiagnosis of PaC or unnecessary surgery.