192Ir pharyngoepiglottic fold interstitial implants. The key to successful treatment of base tongue carcinoma by radiation therapy. 1985

D R Goffinet, and W E Fee, and J Wells, and M Austin-Seymour, and D Clarke, and J M Mariscal, and R L Goode

Twenty-eight patients with squamous carcinomas of the base tongue were seen and evaluated in a conjoint Head and Neck Tumor Board at Stanford between 1976 and 1982. Fourteen patients were treated by combined external beam and interstitial irradiation, 11 of whom had Stage III and IV carcinomas (American Joint Committee). An initial dose of 5000 to 5500 rad was first delivered by external beam irradiation in 5 to 5.5 weeks, followed approximately 3 weeks later by an iridium 192 (192Ir) interstitial implant boost by the trocar and loop technique. The key to successful treatment of these neoplasms was found to be the use of a lateral percutaneous cervical technique, which placed horizontal loops through the oropharyngeal wall above and below the hyoid bone; the superior loop included the pharyngoepiglottic fold and the tonsilloglossal groove. Standard multiple loop implants (submentally inserted) of the base tongue from the vallecula anteriorly to the circumvallate papillae were also used routinely. This approach has been successful, since 10 of the 14 patients (71%) remain without evidence of disease (mean follow-up, 32 months). There have been only two local recurrences, both on the pharyngoepiglottic fold in patients who did not receive the now standard pharyngoepiglottic fold/lateral pharyngeal wall implants. No patients have relapsed after 18 months. The other 14 patients were treated prospectively during the same period by combining initial resection, radical neck dissection, and postoperative irradiation. In this group, there were more locoregional failures compared to the group treated with radiation therapy alone (5 tongue recurrences and 7 neck relapses); in addition, more severe complications were noted in these 14 patients who received surgery and postoperative irradiation. The authors believe that combined external beam and interstitial irradiation is effective treatment for base tongue carcinomas, especially when the high-dose distribution includes the adjacent tonsilloglossal groove, pharyngoepiglottic fold, and oropharyngeal wall to and below the level of the hyoid bone, in addition to treating an adequate base tongue volume.

UI MeSH Term Description Entries
D007495 Iridium A metallic element with the atomic symbol Ir, atomic number 77, and atomic weight 192.22.
D010614 Pharynx A funnel-shaped fibromuscular tube that conducts food to the ESOPHAGUS, and air to the LARYNX and LUNGS. It is located posterior to the NASAL CAVITY; ORAL CAVITY; and LARYNX, and extends from the SKULL BASE to the inferior border of the CRICOID CARTILAGE anteriorly and to the inferior border of the C6 vertebra posteriorly. It is divided into the NASOPHARYNX; OROPHARYNX; and HYPOPHARYNX (laryngopharynx). Throat,Pharynxs,Throats
D011868 Radioisotopes Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Daughter Isotope,Daughter Nuclide,Radioactive Isotope,Radioactive Isotopes,Radiogenic Isotope,Radioisotope,Radionuclide,Radionuclides,Daughter Nuclides,Daugter Isotopes,Radiogenic Isotopes,Isotope, Daughter,Isotope, Radioactive,Isotope, Radiogenic,Isotopes, Daugter,Isotopes, Radioactive,Isotopes, Radiogenic,Nuclide, Daughter,Nuclides, Daughter
D001918 Brachytherapy A collective term for interstitial, intracavity, and surface radiotherapy. It uses small sealed or partly-sealed sources that may be placed on or near the body surface or within a natural body cavity or implanted directly into the tissues. Curietherapy,Implant Radiotherapy,Plaque Therapy, Radioisotope,Radioisotope Brachytherapy,Radiotherapy, Interstitial,Radiotherapy, Intracavity,Radiotherapy, Surface,Brachytherapy, Radioisotope,Interstitial Radiotherapy,Intracavity Radiotherapy,Radioisotope Plaque Therapy,Radiotherapy, Implant,Surface Radiotherapy,Therapy, Radioisotope Plaque
D003131 Combined Modality Therapy The treatment of a disease or condition by several different means simultaneously or sequentially. Chemoimmunotherapy, RADIOIMMUNOTHERAPY, chemoradiotherapy, cryochemotherapy, and SALVAGE THERAPY are seen most frequently, but their combinations with each other and surgery are also used. Multimodal Treatment,Therapy, Combined Modality,Combined Modality Therapies,Modality Therapies, Combined,Modality Therapy, Combined,Multimodal Treatments,Therapies, Combined Modality,Treatment, Multimodal,Treatments, Multimodal
D004825 Epiglottis A thin leaf-shaped cartilage that is covered with LARYNGEAL MUCOSA and situated posterior to the root of the tongue and HYOID BONE. During swallowing, the epiglottis folds back over the larynx inlet thus prevents foods from entering the airway. Epiglottic Cartilage,Cartilage, Epiglottic,Cartilages, Epiglottic,Epiglottic Cartilages
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014062 Tongue Neoplasms Tumors or cancer of the TONGUE. Cancer of Tongue,Tongue Cancer,Cancer of the Tongue,Neoplasms, Tongue,Cancer, Tongue,Cancers, Tongue,Neoplasm, Tongue,Tongue Cancers,Tongue Neoplasm

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