Acardius acormus: Una presentación atípica en el embarazo gemelar. Revisión de la literatura

Objective: presenting a case of a foetal arcadia occurring in monochorionic biamniotic twin pregnancy for reviewing its diagnosis and treatment. Case presentation: this is a case report of an acardius acormus foetus occurring in a monochorionic twin pregnancy diagnosed at week 21 + 4 days and its clinical follow-up. Methodology: the patient's clinical history and diagnostic test results were reviewed. This was followed by a literature search using PubMed and SciELO medical databases. Results: a literature review was made regarding this atypical case; 30 interesting reports were found. Fifteen articles were selected: 9 review articles, 2 case reports, 3 case series and 1 epidemiology note. Conclusions: foetal arcadia is one of the rare complications of monochorionic twin pregnancy and its complication rate is due to placental vascular communications. Early diagnosis and surveillance in this case probably led to a good perinatal outcome.