Cryosurgery for oral and pharyngeal carcinoma.
D002294:Carcinoma, Squamous Cell / Q000601:surgery*; D003452:Cryosurgery / Q000401:mortality; D006801:Humans; D009062:Mouth Neoplasms / Q000601:surgery*; D009584:Nitrogen / Q000627:therapeutic use; D010610:Pharyngeal Neoplasms / Q000601:surgery*; D014067:Tonsillar Neoplasms / Q000601:surgery
D009584:Nitrogen