Nasopharyngeal slice

The nasopharynx is located at the junction of the back of the nasal cavity and the upper part of the throat, just in the center of the skull. The hard skull base is separated from the cranial cavity above the nasopharynx, and several nerves and blood vessels pass around. The nasopharynx is rich in lymphoid tissue, and the opening of the Eustachian tube (Euclidean) is also here. Nasopharyngeal sections are useful for diagnosing the disease. The best treatment time: general surgery is recommended to be treated after the initial diagnosis of the disease, special surgery should be prescribed. Treatment of diseases: nasopharyngeal carcinoma Indication Suspected of nasopharyngeal cancer. Contraindications 1, with systemic diseases, can not tolerate surgery. 2, local infection, not suitable for surgery. Preoperative preparation Can be used for physician palpation, nasopharyngoscopy, nasopharyngeal endoscopy, cranial X-ray examination, Epstein-Barr virus antibody blood test, fiberoptic endoscope, etc. Nasopharyngeal section is only a variety of ways to check nasopharyngeal carcinoma One, don't just ask for a sliced surgery. Surgical procedure 1. When taking and fixing the biopsy tissue, immediately wash away the blood and mucus on the tissue with normal saline or 4% neutral buffered formaldehyde solution, and then fix it with 4% neutral buffered formalin. 2, dehydration and dipping wax dehydration from low concentration to high concentration ethanol gradient dehydration, 70% ethanol 30min, 80% ethanol, 95% ethanol for 30min, anhydrous ethanol I and absolute ethanol II dehydration for 20min. Then use xylene I and xylene II to be transparent for 10 min, 58 °C paraffin I dipping wax for 2 h, 58 °C paraffin II dipping wax for 1 h, and finally 60 ° C paraffin embedding to make wax block, slice with one-time blade, slice thickness is 2~3m.

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