[Hepaticoportal arteriovenous fistula: a case report, discussion of physiopathological and clinical problems, and review of the published literature (author's transl)].

A patient developed an arteriovenous aneurysm between the gastroduodenal and middle colon arteries and the main mesentericoportal vein, following gastroduodenal resection. This case is described, and patients with arteriovenous fistulae in the portal region reported in the published literature (179 cases) are reviewed. Etiological, pathological, and clinical aspects in relation to surgical treatment and according to the type and location of the lesion, are also discussed. Emphasis is placed on a study of physiopathological problems, and the effects provoked by these fistulae on portal vein hemodynamics, arterial hemodynamic function, and on the general circulation are analyzed in greater detail.