(CNN) --The deaths of two conjoined Iranian twins following ... Mourners gathered outside of Raffles Hospital and the sad news spread quickly through the twins' home country of Iran.

RELATED VIDEO: Conjoined Twins Separated After 18-Hour Surgery Added Edwards: "We are honored to have helped with their birth, cared for them since, and to now give them the chance to live ...

Twins Sydney and Lexi were conjoined at birth and separated seven months later in a risky surgery, but are now thriving at age 17 Julie Mazziotta is the Senior Sports Editor at PEOPLE, covering ...

A mysterious complication arose during marathon surgery this week to separate two Iranian sisters born joined at the head, prompting doctors to consider halting the surgery, one of the neurosurgeons ...

The North Carolina girls, born as conjoined twins, were separated more than one year ago and are “thriving,” the hospital reports. “They are doing so good,” Heather Delaney said in the video.

Conjoined twins occur when identical twins have fused bodies before they are born. This condition has also been known as "Siamese twins," now considered an inappropriate, outdated term.

PHILADELPHIA — Twin brothers who were born conjoined recently celebrated their first birthday after undergoing successful separation surgery. Amari and Javar Ruffin, whose family lives in ...

It’s been 30 years since a team of Japanese doctors performed a colostomy reversal surgery on one of a pair of Vietnamese conjoined twins who are believed to have been affected by chemicals ...

Ronnie and Donnie Galyon hope to become the world's oldest conjoined twins in October, when they turn 63 This weekend they are celebrating overtaking the age of their heroes, Thai twins Chang and ...

Conjoined fetuses are a rare type of identical twins that share a placenta and an amniotic sac, when the embryo divides at 13-15 days from conception. The incidence ranges from 1/50,000-1/100,000 ...