Radiotherapy for early glottic cancer and salvage surgery after recurrence / Radioterapia para câncer glótico inicial e resgate cirúrgico após recorrência

Early glottic cancer can be effectively treated with radiation or surgery, but recurrence is a possibility when using any of the treatment modalities. AIM: To assess the outcome of radiotherapy as initial treatment in the control of squamous cell carcinoma of vocal cord (T1) and the effectiveness of salvage surgery (endoscopic or open) after treatment failure. MATERIALS AND METHODS: A retrospective study was based on the analysis of medical records from 43 patients with T1 squamous cell carcinoma of the glottis, radiotherapy as initial treatment and follow-up period of five years. RESULTS: The rate of recurrence after radiotherapy was 30.2 percent of the cases, mean diagnosis interval was 29.5 months. As an option for salvage treatment, patients underwent open partial laryngectomy or endoscopic surgery with control rates of 77.7 percent and 25 percent respectively. CONCLUSION: Our cases showed high rates of recurrence after radiotherapy and open partial laryngectomy was more effective for the salvage surgery.

O câncer glótico inicial pode ser efetivamente tratado com radioterapia ou com cirurgia, contudo a recidiva é uma possibilidade quando utilizada qualquer uma das formas terapêuticas. OBJETIVO: Avaliar o resultado da radioterapia como tratamento inicial no controle do carcinoma epidermoide de prega vocal (T1) e a eficácia do resgate cirúrgico (endoscópico ou externo) após a falha deste tratamento. MATERIAL E MÉTODO: Foi realizado estudo retrospectivo a partir da análise de prontuários de 43 pacientes portadores de carcinoma epidermoide da glote com estadiamento T1, submetidos à radioterapia como tratamento inicial e com seguimento mínimo de cinco anos. RESULTADOS: A taxa de recidiva após radioterapia foi de 30,2 por cento dos casos, com intervalo médio de diagnóstico de 29,5 meses. Como opção para tratamento de resgate, os pacientes foram submetidos à laringectomia parcial externa ou endoscópica com taxa de controle de 77,7 por cento e 25 por cento, respectivamente. CONCLUSÃO: Nossos casos apresentaram altas taxas de recidiva após radioterapia e a laringectomia parcial externa mostrou-se mais eficaz para o resgate cirúrgico.

Análise videolaringoestroboscópica de pacientes submetidos à radioterapia para tratamento de câncer glótico / Videolaryngostroboscopic analysis of patients submitted to radiation therapy for the treatment of glottic cancer

Sendo a radioterapia oncologicamente adequada no tratamento do câncer precoce da laringe, é importante estudar o padrão vibratório, que é componente crítico para os resultados vocais. Objetivo: Analisar os achados videolaringoestroboscópicos em um grupo de pacientes submetidos à radioterapia para o tratamento do câncer glótico precoce. Métodos: Estudo retrospectivo realizado através da avaliação de 20 pacientes estadiados como T1a glótico de 1995 a 2005. Um protocolo videolaringoestroboscópico foi aplicado. Resultados: O fechamento glótico foi completo em 17 pacientes. A amplitude foi normal em 14 pregas vocais tratadas e em 18 pregas contralaterais. O padrão da onda vibratória mucosa foi sempre totalmente presente, normal ou discretamente diminuído em ambas as pregas vocais, com melhores resultados para a prega vocal contralateral em comparação com aqueles verificados nas pregas vocais com o tumor. A periodicidade foi sempre regular em todos os casos. A simetria e os movimentos das pregas vestibulares e das aritenoides foram normais. Houve constrição supraglótica lateral ocasional em quatro casos. O aspecto da mucosa foi edematoso em seis pacientes. Formação de bola de muco foi observada em 12 pacientes. Conclusões: O padrão vibratório foi normal ou discretamente diminuído para ambas as pregas vocais após tratamento radioterápico para câncer glótico T1a.

Radiation therapy is an adequate treatment for early laryngeal cancer, and it is important to study the vocal fold vibratory pattern, which is essential for a favorable voice outcome. AIM: To analyze laryngostroboscopic findings in a group of patients who underwent radiation therapy for the treatment of early glottic cancer. Methods: A retrospective study was conducted in order to evaluate 20 patients staged as T1a glottic tumors in the period from 1995 to 2005. A laryngostroboscopic protocol was applied. Rsualtados: Glottic closure was complete in 17 patients. The amplitude was normal in 14 treated vocal folds and in 18 contralateral vocal folds. The mucosa wave vibratory pattern was totally present in all vocal folds. The periodicity was always regular in all cases. The vestibular fold and arytenoid symmetry and movements were normal. There was occasional supraglottic lateral constriction in 4 cases. The mucosal appearance was normal in 14 and edematous in 6 patients. Mucus build up was observed in 12 patients. Conclusions: The vibratory pattern was normal or slightly diminished in both vocal folds after radiation therapy for early glottic cancer.

Treatment results of radical radiation therapy for early glottic carcinoma

To evaluate the effect of host; tumour and treatment-related parameters that might influence the local control; of early squamous cell carcinoma of the glottis treated with radiotherapy. Seventy patients with T1-T2 NOMO squamous cell carcinoma of the glottic larynx were retrospectively analyzed with a minimum 2-years follow-up. All patients were treated daily with telecobalt unit at 2 GY per fraction to doses of 60-70 GY [median 64]. The following factors were analyzed through uni and multivariate analysis; age: sex; smoking: histologic type and grade; T-extent; anterior commissure invovement: field size: total dose given: overall treatment time and salvagve therapy. The initial treatment response [CR] were 97.8% and 76% while the 5-year local control rates were 82.2% and 56% for T1 and T2 lesions, respectively. On univariate analysis, the recieved total dose was a significant factor for both initial response and local control. Initial response and local control for T1 lesions were 100% and 90%, if total dose given > 60 GY. The corresponding values for T2 lesions were 79% and 63% [P< 0.0001;< 0.001 for T1 and > 0.05 for T2]. Better response and control rates were seen among T1 and T2 patients completed their therapy within