[Absence of the appendix. Apropos of a case]

A case of congenital absence of the appendix is reported by the authors. It is a very rare anatomic finding, the frequency of which is about 1 p. 100 000. The awareness of this malformation must not authorize young surgeon to forsake a difficult search of the appendix. The diagnosis should not be made unless the entire right colon and the ileo-cecal area are mobilized and thoroughly explored.