India, Feb. 26 -- A team of around 20 doctors at the All India Institute of Medical Sciences (AIIMS) successfully removed a parasitic twin, weighing about 15-16 kilos, from the abdomen of a 17-year-old boy in what experts are calling "the country's first reported case of an incomplete parasitic twin", officials said on Tuesday.

The rare condition, known as heteropagus or asymmetrical twinning, occurs in approximately fewer than one in 1 million births worldwide, doctors said, adding that in this case, almost 30% of the body's blood was redirected to the parasitic twin, prompting the urgent medical intervention.

The patient, identified by his first name as Mohit, hails from Unnao in Uttar Pradesh and he has lived with the underdeveloped ...