[Pulmonary sequestration with esophagobronchial fistula. Presentation of 2 cases and a review of the literature].

Pulmonary sequestrations communicating with the gastrointestinal are very uncommon respiratory malformations. We report two personal cases and review 33 more previously published of which 24 were intralobar and 11 extralobar. We demonstrate that this malformation can hardly be separated from "classical" pulmonary sequestrations (ie, those without g.i. communication) a fact attesting their common embryologic origin. In extralobar sequestrations there were no differences in sex, side or associated malformations. In intralobar cases there were female (83%) and right side (67%) predominances, that are not observed in sequestrations without g.i. communication. We call the attention on the great variety of anatomic forms and on the great difficulty to reach an accurate anatomic diagnosis preoperatively.