Autoimmune pancreatitis type 2: Mimicking pancreatic cancer

Autoimmune pancreatitis mimicking pancreatic tumor

Autoimmune pancreatitis (AIP) is a rare disease of unknown pathomechanism. AIP belongs to the IgG4-related disease family and responds well to steroids, although the relapse rate can reach up to 20-30%. Differentiation of AIP from the more common pancreatic cancer can be very challenging. About 20% of autoimmune pancreatitis is diagnosed postoperatively during final histological examination. Wh...

Histopathologically Proven Autoimmune Pancreatitis Mimicking Neuroendocrine Tumor or Pancreatic Cancer

Autoimmune pancreatitis (AIP) can be difficult to distinguish from pancreatic cancer. We report a case of histopathologically proven AIP mimicking neuroendocrine tumor (NET) or pancreatic cancer in a 53-year-old man. He was referred to our hospital for further evaluation of a pancreatic mass detected on ultrasonography at a medical check-up. Abdominal ultrasonography showed a 15-mm hypoechoic m...

Type 2 autoimmune pancreatitis

Histopathology of type 2 AIP The pancreas of patients with type 2 AIP is often only focally involved. The region that seems to be most often affected is the pancreatic head including the pancreatic portion of the distal bile duct. As in type 1 AIP, the outstanding histologic feature is a periductal lymphoplasmacytic infiltrate usually affecting some or all of the medium sized ducts (Figure 1). ...

Autoimmune pancreatitis, pancreatic cancer and immunoglobulin-G4.

Pseudotumoral autoimmune pancreatitis mimicking a pancreatic cancer: a very difficult disease to diagnose

Autoimmune pancreatitis (AIP) is a rare disorder, although the exact prevalence is still unkown. It is a type of pancreatitis that is presumed to have an autoimmune aetiology, and is currently diagnosed based on a combination of 5 criteria. However, in this day and age, some patients with AIP are likely to be resected for the suspicion of malignancy. The authors report a case of pseudo-tumoral ...