The Separation of Conjoined Twins Lily and Addy Altobelli

An inspiring story of conjoined twins. Support our work: Conjoined twins Addison (Addy) and Lilianna (Lily) Altobelli were successfully separated by surgeons at Children s Hospital of Philadelphia (CHOP) on October 13, 2021. The girls were born connected at the abdomen and chest, a condition known as thoracoomphalopagus twins, meaning they shared a liver, diaphragm, chest and abdominal wall. Addy and Lilys journey began when they were diagnosed prenatally at their 20week ultrasound. Before that appointment, parents Maggie and Dom Altobelli had assumed they were having one baby, but the ultrasound image showed that not only was Maggie carrying two fetuses but they were also attached at the abdomen.