In extremely rare cases, one twin fails to fully develop, leaving only a part of it behind. This remnant, known as parasitic twin, remains attached to & dependent on surviving twin.

In a ground-breaking medical achievement, doctors at AIIMS Delhi successfully performed a rare surgery on a 17-year-old boy to remove two extra lower limbs hanging from his abdomen.The condition, known as an incomplete parasitic twin,

Doctors at AIIMS Delhi successfully removed two extra lower limbs from a 17-year-old boy suffering from an incomplete parasitic twin condition. The surgery involved separating shared blood vessels and nerves.

Doctors at Delhi AIIMS have successfully removed two 'parasitic legs' from a 17-year-old boy's abdomen, giving him a new lease of life.

A parasitic twin is an underdeveloped conjoined twin that relies entirely on the host twin for survival. They are extremely rare, with less than one case occurring per 100,000 births. The teenager who had a fully developed extra set of limbs and a pelvis - sustained by a chest artery - underwent a two-hour surgery at Aiims hospital in Delhi.