RESUMO
A woman with a monochorionic diamniotic twin pregnancy was referred to our Centre due to a discrepancy in size between the foetuses. She was 17 weeks' pregnant when the diagnosis of selective IUGR type 2 was made and the laser ablation of the placental anastomoses was performed. During the fetoscopy, we identified an arterio-venous anastomosis with bidirectional flow, which is atypical in this type of anastomoses (unidirectionals) and could represent a sign of ominous prognosis for the restricted twin.
Presentamos el caso de una gestante de 17 semanas con una gestación gemelar monocoriónica biamniótica complicada con RCIU selectivo tipo 2 que requirió, de acuerdo a criterios ecográficos, ablación quirúrgica láser de las anastomosis placentarias. Se identificó durante la fetoscopia una anastomosis arterio-venosa que mostraba flujo bidireccional lo cual es sumamente inusual en este tipo de anastomosis, no reportado antes en la literatura, constituyendo así un signo de mal pronóstico para el gemelo pequeño.