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Japanese Doctors find Brain and Skull inside Teen’s Ovarian Tumor [Teratoma]:
During surgery to remove a 16-year-old girl’s appendix, surgeons discovered a surprise guest - a tumor with a brain, hair and neurons that could transmit electric impulses like a normal brain.
The nearly 4-inch-wide tumor also had a thin plate of skull bone covering the 1.18-inch brain, which included a tiny version of a cerebellum and a mass that resembled a brain stem, New Scientist reported.
While it’s not uncommon for brain cells to be found in ovarian teratomas - tumors that contain foreign tissue including hair, teeth, cartilage, fat and muscle - this patient’s situation was unusual.