THE PURPOSE of this paper is to present 3 cases of mesenteric cysts, 1 of which was a calcified cyst. In addition, certain data derived from a review of the literature will be presented in an attempt to add something to the knowledge of this relatively rare condition. There have been many excellent articles written on this subject covering its various phases, and the reader is referred to a recent article by Vaughn, Lees and Henry, in which the previous literature has been summarized rather completely from the standpoint of history, etiology and classification and in which a case of calcified mesenteric cyst is reported. We have included only cases which were reported in sufficient detail to obtain certain pertinent facts and will present in tabular form the results in 197 cases reviewed plus the 3 cases reported in this paper, which make a total of 200 cases. The incidence