[Abstract] Zhu Zhu (pseudonym), who was born only on May 13 in Jiahe County, Hunan Province, was about to celebrate her 100th day when she developed facial palsy symptoms such as crooked mouth and eyes that could not be closed, and her ears were still bleeding pus. Ovarian teratoma is a tumor caused by oocyte proliferation that has not undergone in vitro fertilization, so it is not valid to say that it is the patient’s twin sibling. Red Network Changsha, August 23 (Reporter Dong Lei correspondent Liang Hui) was born only on May 13 in Jiahe County, Hunan Province, Zhu Zhu (a pseudonym) was about to celebrate her 100th day when she developed symptoms of facial palsy such as crooked mouth and eyes that could not be closed, and her ears were still running pus. After examination, the culprit of all this was a teratoma parasitized in her left ear. Today, the otolaryngology head and neck surgeon of Hunan Provincial People’s Hospital surgically removed the tumor for the baby girl. The parents said that Zhu Zhu’s hearing was impaired in her left ear during several newborn monitoring sessions after birth, and the local hospital suspected a congenital cholesteatoma in the ear. Since the child was too young and had no other symptoms, the doctor suggested waiting until he grew up before performing surgery. In the beginning of August, Zhu gradually developed symptoms such as pus in the ear, crooked mouth, and in severe cases, the left eye could not be closed even when sleeping. The parents had no choice but to take the child to Hunan Provincial People’s Hospital for medical treatment. CT examination showed that the tumor occupied Zhu Zhu’s left external ear canal and compressed the facial nerve, resulting in the child’s facial palsy symptoms. Since the child was too young, there was little space for surgical operation, coupled with his mastoid dysplasia, the facial nerve was squeezed upward by the tumor, and the difficulty of surgery was self-evident. If the surgery was not performed in time, the tumor would continue to grow and aggravate the facial palsy, and lead to more serious conditions such as blindness, meningitis and brain abscess. After consultation and thorough preoperative preparation, yesterday morning, Professor Xiao Xuping, director of the Department of Otolaryngology, Head and Neck Surgery of the hospital, led the doctors of the department to remove a white flocculent tumor measuring about 2.5×1.2×1cm3. Hair, connective tissue and cartilage were clearly visible on the tumor, and it was suspected that the tumor was not a congenital cholesteatoma as previously considered, so the tumor specimen was sent for rapid biopsy, and half an hour later, the pathological section results confirmed that the tumor was a teratoma. Professor Xiao Xuping introduced that teratoma is caused by abnormal development of embryonic tissues in the mother’s body, and usually the embryonic tissues tend to remain in the abdominal cavity of the fetus, but it is very rare that they remain in the ear.