title: Improved technique for the diagnosis of atypical nasopharyngeal cancer.
abstract: This article presents an improved technique for the diagnosis of atypical nasopharyngeal carcinoma tumor at deep sites beneath mucosa. It includes: 1. using spherical gauze to rub the nasopharyngeal cavity for exfoliative cytology; 2. using 1% H2O2 stain in the nasopharyngeal cavity to direct biopsy for suspected early carcinoma; 3. using multiple-hole needle puncture in the nasopharynx. These methods are simple, safe, quick, and have a high positive rate.
mesh_terms: D001706:Biopsy / Q000379:methods; D001707:Biopsy, Needle / Q000295:instrumentation; D003581:Cytodiagnosis / Q000295:instrumentation; D006801:Humans; D006861:Hydrogen Peroxide; D009303:Nasopharyngeal Neoplasms / Q000473:pathology*
chemical_list: D006861:Hydrogen Peroxide