A tiny brain, skull, and hair have been extracted from a teen's ovary
Publish Time: 2017-01-07 19:38:00
Japanese surgeons have pulled a mass of hair, bone, and a tiny, malformed brain, from a teenager’s ovary. What started as a fairly routine operation resulted in a 10-centimetre ‘monster’ being pulled from the teenager’s abdomen, according to a paper recently published in Neuropathology. While performing a run-of-the-mill appendectomy on a 16-year-old female patient, the Japanese surgeons discovered a tumour growing on one of her ovaries, http://www.sciencealert.com reports. What they found inside was pure nightmare fuel – hair, bone ... and a tiny malformed brain.The technical term for the tumour is a mature cystic teratoma. The word 'teratoma' comes from the Greek word teratos, meaning monster, and it’s easy to see why.They are formed when a mass of cells inside a body grows into different tissue types, including bone, nerves, hair, and even teeth. They’re typically a benign tumour surrounded by a capsule, making them relatively easy to remove.Not to be confused with parasitic twins, which grow from a separate embryo that was absorbed while in the womb, teratomas are made from our own errant cells. As with any cancer, they form when the normal signals controlling cell growth fail. Teratomas also happen to act like misbehaving stem cells. In this particular case, it was an immature egg cell in the Japanese girl’s ovary which ignored all signals to sit quietly.Not only did her egg cell divide, those new cells took on the form of hair follicles and a thin layer of bone covering a brain-like structure resembling a brainstem and cerebellum.It’s thought roughly 20 percent of ovarian tumours contain differentiated tissues, making such teratomas surprisingly common.Though rarely fatal, tumours which contain nerve cells pose a unique risk – where the immune system recognises the cancer as a threat, they can then mistaken the patient’s own brain cells as an enemy.Fortunately this patient showed no symptoms of an immune response against her own nervous system.Discovering nerve cells inside a teratoma might not be all that unusual, but finding them arranged in a neurological structure, like in the case of this tumour, is extremely rare. Especially tissue that could carry nervous impulses.<
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