A young adult female in India unknowingly lived with one of the uncommon and most unsettling medical conditions for nearly two decades , her doctor say . concord to a causa report out this calendar week , the fair sex had a sac containing her still - growing “ twinned ” lodged in her abdominal cavity for 17 eld . The twin had hair , teeth , and even a backbone .

officially known as foetus in fetu , the condition is suppose to find when one foetal twin gets enveloped by the other very early in gestation . The foetus does n’t go on to evolve its own nervous system and brain , but it ’s still capable of living . And it sustains itself through its sib , essentially becoming a leech . Another possibility holds that the second “ fetus ” is in reality a complex course of neoplasm call a teratoma ; these tumor can evolve different type of tissues at once , including hair and teeth .

https://gizmodo.com/doctors-remove-132-pound-nightmare-tumor-from-connectic-1825783556

A CT scan of the fetus in fetu found inside the woman’s abdomen

A CT scan of the fetus in fetu found inside the woman’s abdomenImage: Kumar, et al (BMJ Case Reports)

irrespective of how the precondition come about , it normally ends in miscarriage , due to not enough nutrition available for the intact foetus . But even when someone live on , the condition is unremarkably quickly detected soon after nascency or in early puerility . Prior to this example , concord to the fair sex ’s doctor , there had been only seven other report cases of grownup living with a fetal twin . And up until now , they had all been men .

The womanhood ’s ordeal , detailedby her doctors in BMJ Case Reports , really began five years before she visited them . That ’s when she and her menage first noticed she had a operose , misshapen clod around her abdomen . Over the next five years , the lump gradually grow in size of it and do her hurting periodically . By the time the then-17 - year - old inflict the doctor , she was n’t able to rust much before finger full , potential because the clod had started to conjure on her internal pipe organ .

On the initial physical examination , the lump was suspected to be a neoplasm . Which in a sensation , it was . But when they ran a CAT rake on the stumblebum , they happen deposits of Ca that looked like “ the shape of vertebra , ribs and foresighted bones , ” and the more gruesome verity was last uncover . The doctors then run to work withdraw it .

Photo: Kumar, et al

The “twin” tumor, taken out of the girl’s body.Photo: Kumar, et al (BMJ Case Reports)

accord to the report , the subject of the tumor “ comprise of hairs , fledged os and other body region . ” These dead body parts included “ multiple dentition and structure resembling limb buds . ” Its diaphanous size—36×16×10 centimeters — would also make it the largest ever find in a case of grownup fetus in fetu .

Thankfully , with the lot gone , the woman had a quick and uneventful convalescence , and two yr later is still doing well .

“ I am find very well and my abdomen is now flat and my parents are also very happy , ” she wrote in a patient perspective included with the theme .

Argentina’s President Javier Milei (left) and Robert F. Kennedy Jr., holding a chainsaw in a photo posted to Kennedy’s X account on May 27. 2025.

In an unsettling last to this unusual story , the doctors were n’t capable to skin out every last cellular shadow of the “ twin ” from the patient . So there ’s still a remote probability some of these cells could behave like a malignant neoplastic disease and grow out of restraint . To mitigate that danger , the doctors read they ’ll be observe the girl on a yearly basis for signaling of trouble .

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