[Angiofollicular lymph node hyperplasia. About an exceptional meso-sigmoid localization (author's transl)].

The authors report the first angiofollicular Lymph-Node Hyperplasia (Castleman'tumor) case with a meso-sigmoid location. They carry out a general review of the literature on 315 observations and insist on the anatomic and evolutive aspects allowing a better understanding of the histogenesis of the lesion. The inflammatory theory, actually acknowledge by most of the authors, also seems to them the most plausible.