I have endeavored to compile all cases of cysts of the pancreas from the members of the Chicago Surgical Society for a careful study and report. The classification (modified from Oser1) is as follows:
I. Retention Cysts.
A. Chronic indurative pancreatitis.
B. Compression of duct from without.
C. Obstruction of duct from within, as by calculi, parasites or catarrhal inflammation.
II. Cystic Neoplasms (proliferation cysts).
2. Congenital cystic disease.
4. Fetal adenoma.
5. Mixed tumor.
2. Epithelioma cystica.
III. Pseudocysts.—cysts resulting from hemorrhage, degeneration or necrosis.
1. Degenerating tumors, sarcoma, carcinoma, etc
3. Vascular disease.
4. Acute pancreatitis.
1. Caused by same factors as the intrapancreatic pseudocysts.
IV. Parasitic Cysts.
Pancreatic cysts arising from dilatation of the ducts or proliferation of epithelium are often classified as true cysts. Those dependent on