RETROPERITONEAL CYSTS

Abstract
The results of frequent surgical intervention in the upper abdomen has gradually changed our ideas regarding tumors and their development in this region. This change in our ideas is analogous to that which followed frequent operations on appendiceal and pelvic conditions. In spite of frequent operations, cystic tumors developing in the region of the pancreas and having relationship with, rather than belonging to, that organ are still denominated pancreatic cysts. That fetal remains may be found retroperitoneally is a well-known and accepted fact. That tumors develop from the middle and lower portion of the Wolffian body and tubules, as well as from the ducts of Müller, is also well known. In view of this knowledge, it seems strange that for such a long time retroperitoneal cysts, other than dermoid, have usually been designated by the name of the glandular structure with which they were most intimately in connection. The uncertainty

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