Conjoined twins

The world’s oldest conjoined twins have died – what we know about this rare condition

Retrieved on: 
Friday, April 19, 2024

The world’s oldest conjoined twins, Lori and George Schappell, recently died, aged 62.

Key Points: 
  • The world’s oldest conjoined twins, Lori and George Schappell, recently died, aged 62.
  • Conjoined twins are incredibly rare, accounting for about one or two in every 100,000 births.
  • Because conjoined twins are so rare, it is difficult to know exactly how they come about.

Types of conjoined twins

  • There are 15 recognised types of conjoined twins, based on the various places their bodies fuse.
  • Conjoined twins are usually picked up on routine ultrasound scans performed during pregnancy.
  • Conjoined twins who are diagnosed by imaging are typically delivered by caesarean section.

Separating twins

  • One of the longest operations to separate conjoined twins, who were fused at the cranium, took more than 100 hours.
  • The earliest recorded attempt at surgical separation of conjoined twins dates back to AD945 in Armenia where conjoined brothers lived until middle age before one of them died.
  • Separating conjoined twins requires a significant amount of planning before surgery can begin, including, of course, lots of imaging such as ultrasound, CT and MRI.
  • Twins who share vital organs – or whose organs are fused – have a lower chance of a successful separation.


Adam Taylor does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

Turkish Medical Team Separates Conjoined Twins in 9 Hours, Breaking World Record

Retrieved on: 
Tuesday, June 28, 2022

A Turkish medical team has successfully separated conjoined twins shortly after birth by employing a range of innovative techniques, including virtual simulations and 3D modeling.

Key Points: 
  • A Turkish medical team has successfully separated conjoined twins shortly after birth by employing a range of innovative techniques, including virtual simulations and 3D modeling.
  • Carried out at Istanbuls Acibadem Hospital, the successful procedure set a new world record for the fastest-ever operation of its kind.
  • View the full release here: https://www.businesswire.com/news/home/20220627005307/en/
    Turkish Medical Team Separates Conjoined Twins in 9 Hours, Breaking World Record (Photo: Business Wire)
    Thanks to our team of dedicated professionals, we were able to separate the twins in a well-planned surgical procedure that took about nine hours, Prof. Mehmet Veli Karaaltin, who supervised the operation, says.
  • As a result of the procedure, the twins, who were born conjoined at the breastbone but has two hearts, were both able to survive on their own.

Conjoined Twins From Mali Given New Lease of Life at Sidra Medicine, Qatar

Retrieved on: 
Wednesday, October 10, 2018

Doctors at Qatar's first specialist women's and children's hospital Sidra Medicine have successfully separated conjoined twins, marking a first for the country.

Key Points: 
  • Doctors at Qatar's first specialist women's and children's hospital Sidra Medicine have successfully separated conjoined twins, marking a first for the country.
  • Globally, conjoined twins occur once in about every 200,000 births.
  • Omphalopagus twins, those who are connected at the belly and liver, are some of the most complex to separate.
  • We are immensely grateful to the Government of Qatar, Hamad Medical Corporation and Sidra Medicine for their tireless efforts to save the lives of our boys."