A 15-year-old boy who inserted a knotted USB cable into his penis ended up needing surgery after it got stuck inside him.
The unidentified teenager, of London, told doctors he inserted the cable to 'measure the length of his penis'.
But his experiment went wrong when the already-knotted cable got stuck, with both ends of the USB left hanging out of his member.
The boy made several attempts to remove it himself but this resulted in him urinating a large amount of blood, prompting his family to take him to A&E.
The X-Ray of the knotted USB cable after it became stuck inside the boy's body. The teenager inserted it into his penis in a sexual experiment gone wrong. After repeated attempts to remove the item by both himself and medical professionals were unsuccessful, an X-Ray was ordered to determine the exact size and location of the object ahead of surgery.
Hospital staff also failed to pull out the cable using special tools due to the position of the knot, doctors detailed in the journal Urology Case Reports.
The boy was urgently transferred to University College Hospital London for further treatment.
He asked to be examined without his mother present, and confessed to staff that he inserted the cable to measure his penis out of sexual curiosity.
After an X-ray revealed the exact size and positions of the knot, the teen was sent to surgery.
In an effort to remove the cable, surgeons cut lengthways into his bulbospongiosus muscle, an area between the genitals and the anus.
Medics managed to extract the knot through the incision and then cut it free from the rest of the cable.
Once the knot was removed, the remaining two pieces of the cable were pulled out the opening of his penis.
There were no complications in his recovery and he was discharged from hospital the next day.
The USB cable after it was removed from inside the boy's penis. Surgeons cut through the muscles surrounding the penis and scrotum and then severed and removed the knot. The two ends of the cable were then pulled out through the penis opening.