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. 2013 Sep;27(9):523–530. doi: 10.1155/2013/180461

TABLE 3.

The Mayo Clinic HISORt criteria for the diagnosis of autoimmune pancreatitis

Diagnostic criteria Findings
Histology (at least one should be met)

  1. Periductal lymphoplasmacytic infiltrate with obliterative phlebitis and storiform fibrosis

  2. Lymphoplasmacytic infiltrate with storiform fibrosis showing abundant (10 cells/hpf) IgG4-positive cells
Imaging (parenchymal and ductal)

  1. Typical: diffusely enlarged gland with delayed enhancement; diffusely irregular, attenuated main pancreatic duct.

  2. Others: focal pancreatic mass/enlargement; focal pancreatic duct stricture; pancreatic atrophy; pancreatic calcification; or pancreatitis
Serology Elevated IgG4 levels
Other organ involvement Extrapancreatic manifestations
Response to steroids Resolution of pancreatic and extrapancreatic manifestations with steroid therapy

Adapted from reference 33. hpf High-power field; Ig Immunoglobulin