Yingsui Huang

1 Introduction Periviable gestation, as the gestational age (GA) spectrum, is accompanied by severe morbidity and mortality rates in survivors at the lower threshold. GA of 22 weeks has been recognized as a lower threshold of periviable gestation, while such infants are potential candidates for selective resuscitation [1]. Survivors under the periviable GA are rare, with just sporadic reports [2-4]. In this study, one preterm infant with a GA of 21+4 weeks was reported.

1 INTRODUCTION Noonan syndrome (NS) accounts for a frequently seen, mainly autosomal-dominant genetic disease, and its phenotype differs with regard to the severity, with the possible involvement of multi-organ systems.