Although cases of Meckel's diverticulum have been reported in the literature from time to time for the past thirty years, it was only recently that the pathologic changes occurring in the diverticulum were studied carefully. In the last two years we observed four cases with such varied changes in the symptomatology and pathology that we thought it would be of value to report them and to analyze all the previously reported cases in children, in an attempt to classify the various types of pathologic changes with their attending symptom complexes. Only the cases occurring in children up to and including the age of 15 were collected. Forty-seven cases were found, making a total of fifty-one.
The embryology and anatomy of Meckel's diverticulum will not be considered here, as it has been thoroughly discussed in several previous reports (Tisdall,1 Winkelbauer,2 Aschner and Karelitz,3 Stulz and Woringer,4 Abt