Time-dose-response relationships in postoperatively irradiated patients with head and neck squamous cell carcinomas.

BACKGROUND AND PURPOSE: To define the influence of the dose and time on the response to treatment in postoperatively irradiated head and neck cancer patients and to establish a good prediction of failure. METHODS AND MATERIALS: From January 1985 to December 1995, 214 patients with histologically proven head and neck squamous cell carcinomas were irradiated after radical surgery or single tumour resection according to surgical and histopathological findings. The total doses given ranged between 50 and 75 Gy to the primary bed tumour and between 42 and 56 Gy to the neck with fraction sizes of 1.7-2 Gy/day. The median length of the time interval between surgery and radiotherapy, time of irradiation and total treatment time were 81, 59 and 139 days, respectively. The end-point analyzed was the local-regional tumour control rate at the primary tumour bed and neck for 5 years from the beginning of radiotherapy. Univariate and multivariate analyses were used to determine predictors of failure from among the following studied variables: (i), clinical stage (T/N) of the patients; (ii), tumour grade; (iii), neck surgery; (iv), tumour margins; (v), histological tumour nodal extension; (vi), chemotherapy; (vii), normalized total dose; (viii), time interval between surgery and radiotherapy; (ix), time of irradiation; and (x), total treatment time. RESULTS: The actuarial 5-year tumour control rate for the entire group was 72%, and 92% of the patients who achieved local control are currently alive without disease. Tumour control was inversely related to T stage (83% for T2 vs. 57% for T4) and the probability of local control within each stage was dependent on the N status (> or =71% for T3-T4/N0 vs. 31-44% for T3-T4/N1-N3). Histological N status and tumour margins, but not tumour grade, impacted significantly on tumour control. When local control was analyzed as a function of the dose to the primary, a non-significant negative dose-response relationship was found. The total treatment time was a significant prognostic factor, and the time interval between surgery and irradiation proved to be an independent predictor of failure. CONCLUSIONS: Despite the absence of a statistically significant dose-response relationship, the present results suggest that postoperative irradiation treatment given to patients with head and neck squamous cell carcinomas should not be unduly prolonged, in order to minimize the amount of tumour cell proliferation. In these patients, nodal involvement, positive margins of the resected specimens and time interval between surgery and irradiation were the most important prognostic factors.     

Advanced carcinoma of the larynx: Results of surgery and radiotherapy without induction chemotherapy (1980–1985): A multivariate analysis

Induction chemotherapy has been proposed in the case of advanced laryngeal cancer in order to preserve laryngeal function in those patietns who are complete responders. To clarify the treatment policies, a restrospective multicentric analysis of 116 patients with advanced carcinoma of the larynx treated by radical surgery and postoperative radiotherapy was carried out in order to evaluate prognostic factors for local control and survival.

Between 1980 and 1985, 116 patients with Stage III squamous cell carcinoma of the larynx underwent radical surgery and postoperative radiotherapy with a curative intent. Treatments were very homogenous, and doses delivered were in the range of 50–65 Gy according to nodal involvement and surgical margins status.

The local recurrence rate and the local disease-free survival rate at 5 years were 22.5% and 76.3%, respectively. Actuarial survival at 5 years was 68.3% with 44 patients stil alive who no evidence of disease (NED) with more than 5 years follow-up. For both overall survival and relapse-free survival, cervical node involvement with capsular rupture was found to be the only significant adverse pronostic factor in univariate and multivariate analysis. No other parameter was predictive either for local recurrence or for survival.

Local prognosis and survival depend largely on nodal involvement and capsular rupture while increasing doses of radiation strategy is likely to reduce the risk of local and nodal recurrence. Preservation of functional larynx is certainly an important goal to achieve when treating advanced carcinoma of the larynx, provided that local failure rate and survival be similar. In the unique randomized study previously published in the literature comparing radical surgery and postoperative radiotherapy to induction chemotherapy and radiotherapy, the local-regional failure rate was drastically increased in the chemotherapy arm. Other results from well-designed controlled studies are awaited before recommending systemic induction chemotherapy and larynx preservation in complete responders. On the other hand, testing synchronous or alternated chemotherapy vs. induction chemotherapy may address the pending questions about the optimal treatment of advanced laryngeal carcinoma.     

Are postoperative complications more frequent and more serious after irradiation for laryngeal and hypopharyngeal cancer?

In order to improve local cure rates and survival in patients with head and neck cancer, combinations of radiotherapy and surgery are used. Most reports on such treatment results indicate an improvement with combined therapy. However, it is not clear whether it is best to irradiate before or after surgery. There is disagreement in the literature, whether postoperative complications are more frequent when the irradiation is given prior to surgery. The incidence of postoperative complications was studied in 213 patients who had a laryngectomy for laryngeal or hypopharyngeal cancer. The incidence of major complications was 8.5% after a preoperative dose of 40 or 50 Gy. After rescue surgery for radiation failure this percentage was 32%. In our experience, the incidence of postoperative complications after doses up to 50 Gy/5 weeks is comparable to what can be expected after surgery alone. When higher doses are given, these complications are more frequent. In designing treatment plans, such considerations should be kept in mind.     

老年Ⅲ期和Ⅳ期喉癌患者的手术治疗与喉功能重建

目的探讨老年晚期喉癌患者的手术治疗方法与喉功能重建及其疗效。方法回顾性分析87例65岁以上老年晚期喉癌患者行手术治疗的临床资料,其中声门上癌48例,声门癌35例,声门下癌4例。按2002年UICC标准,Ⅲ期患者44例,Ⅳ期43例。全部患者均无远隔转移。行喉大部分切除术36例,喉次全切除术21例,喉全切除术30例。用Kaplan-Meier法计算生存率。结果全部患者3年生存率为73．2％,5年生存率为67．4％。术中无死亡。喉部分切除占全部手术患者的65．5％（57／87）。喉部分切除术拔管率80．7％。全部患者均恢复经口进食,喉部分切除患者均恢复了发音功能。结论对老年晚期喉癌患者行手术治疗是安全、有效的,老年晚期患者保留喉功能是可行的,关键是严格掌握手术适应证,提高外科手术技巧,减少术后并发症。     

Postoperative radiotherapy in N0 laryngeal cancer]

PURPOSE: A retrospective study to re-assess the indications for postoperative radiation therapy in squamous cell carcinoma of the larynx staged N0 after gross resection. PATIENTS AND METHODS: Between January 1975 and December 2000, 166 patients with squamous cell carcinoma of the larynx were treated by total laryngectomy with or without neck dissection. Surgery was completed by external radiotherapy delivering 45 to 65 Gy to the tumour bed and 45 to 50 Gy to cervical lymphatic chains. Minimal follow-up was 36 months and median follow-up was 98 months. RESULTS: The rate of nodal recurrence was 6% (median time for relapse was 9 months). The survival rates at 1, 2, 3 and 5 years were 93.5, 84, 80 and 69% respectively, with a 8 year 3 month median survival. The univariate analysis showed 4 parameters, which significantly increased the risk of local recurrence: the medical necessity for immediate tracheotomy, the subglottic involvement, the involvement of the whole larynx and the presence of lymphatic embols in the neck dissection. There was no statistically significant difference between the patients with or without a neck dissection. Fifty-nine secondary cancers were observed, 15 of them occurring in the head and neck area. The late complications consisted of cervical subcutaneous fibrosis (7%), oesophageal stricture (4%), oeso-tracheal fistula (l%), hypothyroidism (3%), bone necrosis (1%). CONCLUSION: Prophylactic cervical radiotherapy in laryngeal cancers resulted in 6% cervical node recurrence rate. This value may represent the maximal rate to accept if one would favour new therapeutic strategies based on restricted indications for radiotherapy.     

Percent positive axillary lymph node metastasis predicts survival in patients with non-metastatic breast cancer

PURPOSE: We retrospectively evaluated the impact of percent positive axillary nodal involvement on the therapeutic outcomes in patients with non-metastatic breast cancer receiving postmastectomy radiotherapy and chemotherapy. MATERIALS AND METHODS: Between January 1994 and December 2002, the medical records of 939 eligible non metastatic breast carcinoma patients were analyzed. Chest wall radiotherapy was indicated in case of positive surgical margin, tumor size equal or more than 4 cm, skin-fascia invasion. Lymphatic irradiation was applied for more than three metastatic axillary lymph nodes, incomplete axillary dissection (<10 lymph nodes), extracapsular extension or perinodal fat tissue invasion. A total dose of 50 Gy was given to chest wall and lymph node regions with 2 Gy daily fractions. Statistical analyses were performed by Kaplan-Meier method, Log-rank test and Cox's regression analysis. RESULTS: The median follow-up for all patients alive was 62 months. The 5-year overall survival (OS) and disease-free survival (DFS) for entire cohort were 81%, and 65%, respectively. Univariate analysis for OS revealed significance for tumour size (< or =5 cm vs. >5 cm, p<0.001), metastatic nodal involvement (0 vs. 1-3 vs. >4 LN, p<0.001), percent positive nodal involvement ([metastatic nodes/total nodes removed] x 100; 0 vs. < or =25% vs. 26-50% vs. >50%, p<0.001), surgical margin status (negative vs. positive, p=0.05), and hormonal treatment (present vs. absent, p=0.03). DFS had similarly significance for age (< or =40 years vs. >40 years, p=0.006), tumour size (0.02), metastatic nodal involvement (p<0.001), percent positive nodal involvement (p<0.001), and perinodal invasion (present vs. absent, p=0.01). Multivariate analysis revealed significance for tumour size, percent positive nodal involvement, hormonal treatment, and surgical margin status for OS. Age and percent positive nodal involvement were found to be significant for DFS. CONCLUSION: Percent positive nodal involvement was found to be a significant prognostic factor for survival in all end-points.     

乳腺癌保乳术后放化疗５２例临床观察

目的　观察乳腺癌保乳术后放射治疗的疗效及毒副反应。方法　对可行保乳术的５２例患者行肿瘤切除或加腋窝淋巴结清扫,术后采用放疗联合辅助化疗。６ＭＶ-Ｘ线全乳腺双切线半野照射,照射剂量４５～５０Ｇｙ,局部瘤床采用１０～１５ＭｅＶβ线加量１０～２０Ｇｙ,总剂量５６～６６Ｇｙ;化疗采用ＣＡＦ或ＴＥ方案。结果　５２例患者均获随访,其１、２和３年生存率分别为９８.１％、９２.３％和９０.４％,３年局部复发率为５.７7％,乳房美容满意率达９０.４％。４０例（７６.９％）患者发生了１、２级放化疗毒副反应,主要为白细胞减少。结论　早期乳腺癌采用保乳手术加放化疗可取得满意疗效,且保留乳房的美容效果佳。     

Histiocytose langerhansienne osseuse multifocale : place de la radiothérapie

Langerhans cell histiocytosis is a non-malignant proliferative disease of unknown etiology that can affect one or more organs. This is a rare disease, 1 to 2/100,000, affecting mainly children with a male predominance. The osseous lesions are the most frequent (60 to 90%). There is however no consensus treatment for the management of these sites. We report the cases of two patients successfully treated with radiotherapy after primary chemotherapy, at doses of 15 Gy in ten sessions of 1.5 Gy for one patient and 18 Gy in ten fractions of 1.8 Gy for the other. Single or multifocal bone Langerhans cell histiocytosis without visceral involvement is a benign, self-limiting affection in most cases. Some bone lesions could be treated by radiotherapy alone. But the high variability of doses currently given in the literature does not allow determining the lowest effective dose limiting the risk of secondary neoplasia or impaired growth in children, in whom lower doses of 6 to 8 Gy are recommended. The decision of radiotherapy must be weighed against the risk of the disease. Caution should be the rule in this non-malignant tumour pathology.     

外阴癌临床治疗309例报告

目的　分析外阴癌不同治疗方法的结果 ,并探讨其复发转移的特征。方法　采用回顾性研究的方法 ,对 30 9例外阴癌的临床治疗结果进行分析。结果　 30 9例患者总的 5年生存率为6 7.9% ,Ⅰ、Ⅱ、Ⅲ及Ⅳ期的 5年生存率分别为 86 .9%、82 .5 %、5 9.2 %和 43.6 %。总的治疗失败率为49 .8% (其中 2年内失败者占 6 9.5 % ) ;复发部位依复发时间不同而异 ,83.6 %的腹股沟、盆腔及远处转移发生在治疗后 2年内 ,外阴局部复发占 2年后治疗失败的 81.1%。外阴癌复发转移与年龄无关。Ⅰ期癌各种治疗方法的生存率及治疗失败率差异无显著性。Ⅱ期癌外阴根治性切除 腹股沟清扫术生存率较高 (P <0 .0 5 ) ;腹股沟淋巴结阳性者 ,手术治疗的失败率显著低于放疗 (P <0 .0 5 ) ;腹股沟淋巴结阴性者 ,两种治疗方式差异无显著性 ;腹股沟预防照射剂量Dm达 6 0Gy者 ,失败率显著低于剂量Dm <6 0Gy者 (P <0 .0 5 )。结论　早期外阴癌应施行外阴根治性切除 ,加施预防性淋巴清扫或腹股沟足量放疗 ;对中晚期患者 ,争取切除原发灶及行腹股沟淋巴清扫 ,并辅以术前、术后放疗。     

Radical Surgery and Postoperative Split-Course Radiotherapy in Squamous Cell Carcinoma of the Head and Neck—Factors Influencing Local Control and Survival

During the period 1970-1989, 256 patients with squamous cell carcinoma of the head and neck were treated with radical surgery and postoperative split-course radiotherapy. The 3-week rest period was compensated by a 10% increase in the total radiation dose to 66 Gy. The 5-year actuarial local control rate was 66% in tonsillar, 60% in mobile tongue, 64% in floor of the mouth, 51% in lower gingiva, 63% in laryngeal, and 35% in hypopharyngeal cancer. Failures were observed in 102 patients (40%) and 51 (20%) died of intercurrent diseases. Except in mobile tongue cancer, the results in the logistic regression analyses showed that T- and N-category and pretreatment Karnofsky index had the strongest association with local control, whereas in Cox's proportional hazard's regression analyses T-category and pretreatment Karnofsky had the strongest association with survival. In mobile tongue cancer, the histologic grade and the time interval between surgery and radiotherapy had the strongest association with local control and survival respectively. However, the lengthening of the time interval was often caused by factors or events which could have influenced the prognosis. On the basis of both univariate and multivariate analyses, when the tumour resection margins were free, a time interval of less than 3 months, the overall treatment time and the duration of the split of radiotherapy, became less important for local control and survival when doses of 65 Gy were given by fraction of 2 Gy or greater.     

Carcinoma of the Hypopharynx a Retrospective Analysis of the Treatment Results over a 25-Year Period

One hundred and sixty-two patients treated for hypopharyngeal cancer during the 25-year period 1958-1982 were reviewed retrospectively. Of the 162 patients, 29 received combined treatment with surgery and postoperative irradiation, 106 received radical radiotherapy alone, and 27 palliative radiotherapy. The 5-year survival rate was 28% for the patients treated with combined therapy and 16% for the patients treated with radical radiotherapy. There were no long-term survivors in the palliatively treated group. The major cause of death was tumour (102 patients) while 40 patients died of intercurrent diseases.     

早期乳腺癌保乳治疗的临床研究

目的：探讨早期乳腺癌保乳术后综合治疗的效果。方法：对１０８例早期乳腺癌行保乳治疗,并与同期行改良根治术治疗的１２１例早期乳腺癌行对比研究。保乳治疗患者年龄３１～６１岁,中位年龄４４.５岁。保乳术后行全乳腺放疗和瘤床加量,处方剂量５０Ｇｙ／５周,瘤床追加６～９ＭｅＶ电子线１０～１５Ｇｙ／７～１０天。改良根治术患者年龄３４～６８岁,中位年龄４７.６岁。改良根治术后放疗的范围根据肿块大小和淋巴结转移情况决定,处方剂量５０Ｇｙ／５周。两组均采用ＣＡＦ或ＣＭＦ方案化疗,ＥＲ或ＰＲ阳性的患者给予内分泌治疗。结果：１０８例保乳治疗患者中３例复发,５例出现远处转移（２例为骨转移,１例为骨、肝、肺多发转移,２例为肺转移）。术后６个月美容效果评估优、良者为９１.７％,术后１年为９２.６％。１２１例改良根治术患者中３例复发,７例出现远处转移（３例为骨转移,３例为肺转移,１例为多发脏器转移）。两组的近期疗效差异均无统计学意义（Ｐ＞０.０５）。结论：早期乳腺癌采用保乳术及术后综合治疗的疗效不低于改良根治术,且美容效果更优。     

Surgical treatment of laryngeal cancer

From March 1974 to December 1982, 186 patients with laryngeal cancer were treated by operation alone in our hospital. In this series, the average age was 56.5 years. The sex ratio of male and female was 2.9:1. Total laryngectomy comprised 42%, partial laryngectomy 20.4% and postlaryngectomy reconstruction 37.6%. The 3 and 5 year survival rates were 75% and 74% for glottic cancer, 67% and 61% for supraglottic cancer, 67% and 67% for infraglottic cancer, 70% and 38% for transglottic cancer. The authors believe that, at present, operation is the main method of treatment. For early laryngeal cancer, partial laryngectomy is indicated for better postoperative functions in addition to higher survival rate. In advanced laryngeal cancer, total laryngectomy and other radical operation as well as combined therapy are advocated.     

Definitive radiotherapy for 114 cases of T3N0 glottic carcinoma: influence of dose-volume parameters on outcome.

BACKGROUND AND PURPOSE: Assuming that the dose-response curve for T3N0M0 glottic carcinoma is steep and that the rate of occult lymph node metastases is low, it should be possible to employ high biological tumour doses to modest target volumes and thereby maximise laryngeal control without compromising final neck control. Within the constraints of a retrospective study we aim to examine this policy with respect to local control, incidence of nodal relapse and late complications. MATERIALS AND METHODS: One hundred and fourteen patients with T3N0M0 glottic carcinoma who received a 3-week schedule of radical radiotherapy between 1986 and 1994 were analysed. The median age was 67 years (range, 34-85 years) and the median follow-up for living patients was 4.8 years (1.9-8.9 years). There were no strict selection criteria for those patients treated with radiotherapy. RESULTS: The 5-year overall survival was 54%. The 5-year local control with radiotherapy and the ultimate loco-regional control following salvage laryngectomy were 68 and 80%, respectively. Nine patients (8%) suffered a regional nodal relapse but only three of these (3% overall) occurred in the absence of local failure. Four patients (3.5%) developed serious late complications requiring surgical intervention (three received 55 Gy and one 52.5 Gy). CONCLUSIONS: It is possible to employ maximum tolerable doses to specific target volumes and thereby exploit the dose response demonstrated and minimise major late effects. The use of modest target volumes resulted in only 3% of patients requiring surgery that might have been avoided had prophylactic neck irradiation been employed.     

Phase Ⅱ Study on Breast Conservative Surgery Plus Chemoand Radiotherapy in Treating Chinese Patients with Early Staged Breast Cancer

Purpose: To evaluate the efficacy of conservative surgery plus chemo-, radio-therapy in treating patients withearly stage breast cancer. Patients and Methods: Eligible patients were treated by postoperative chemotherapyas well as whole-breast irradiation with tumor bed boost. Postoperative radiotherapy consisted of 6 MV wholebreast linear accelerator irradiation with two tangential half fields to a total dose of 45~50 Gy, followed by10~15MeVβ boost irradiation to tumor bed for 10~20Gy, total dose 56~66Gy. Results: Fifty-two patients wereenrolled. Overall 1-, 2- and 3 year survival rates were 98.1%, 92.3%, and 90.4%, respectively, with a localrecurrence rate of 5.77%. Cosmetic results were evaluated as good by doctors in 90.4% of patients. Conclusions:Breast conservative surgery combined with chemo- radio-therapy could be a treatment option for Chinesepatients with early stage breast cancer.     

The effect of laryngeal irradiation on pharyngoesophageal motility

The upper esophageal sphincter (UES) receives the full radiation dose during external beam radiotherapy to the adjacent larynx. The aim of the study was to assess the effects, if any, of radical laryngeal radiotherapy on motility patterns in the pharyngoesophageal segment. A strain gauge assembly and a digital manometric recorder were used to assess 19 patients 13 to 71 months after irradiation of T1 to T3 glottic cancer to a central dose of 52.5 to 55.7 Gy in 20 daily fractions. Results were compared with those of 23 healthy controls. Tonic lower esophageal sphincter (LES) pressure, distal peristaltic contraction, tonic UES pressure, and eight parameters of pharyngoesophageal dynamics during water and bread swallows were studied. No difference was found between the two groups in tonic LES pressure, peristaltic amplitude, or tonic UES pressure. Water swallow pharyngoesophageal wave velocity was significantly lower in patients than in controls, and the irradiated group also showed a trend toward increased duration of the distal esophageal peristaltic wave. The reduction in upper esophageal wave velocity was associated with the interval following irradiation. The post-treatment interval was also inversely related to the amplitude of UES after-contraction, and associated with an increase in wave duration throughout the pharyngoesophageal segment. A study of 23 laryngectomy specimens, 5 of which had been removed following radiotherapy, failed to identify pathological features in nerves or muscle which characterised previous laryngopharyngeal irradiation. We conclude that laryngeal irradiation has no effect on upper or lower esophageal sphincter tone but causes an increase in wave duration and a reduction in wave velocity in the pharyngoesophageal segment. These changes are independent of age and sex and are not associated with pathological features like the neural degeneration described in the myenteric plexus of irradiated rectum.     

Intérêt des traitements adjuvants dans les sarcomes utérins : expérience de l’institut CurieRole of adjuvant treatments in uterine sarcoma: experience of Curie Institute.

Purpose. – Uterine sarcoma is a rare disease and survival is poor. From 1975 to 1995, 73 uterine sarcomas were treated at the Curie Institute, and we analysed prognostics factors of survival.Patients and methods. – Seventy-one patients underwent primary surgery, in most cases a radical non conservative surgery and a lymphadenectomy. Every patient had an irradiation (external beam irradiation and/or brachytherapy), and 24 patients received adjuvant chemotherapy. We observed that youngest patients had more leiomyosarcomas and low histologic grade tumours. Median survival was 42 months, and 5-years survival and local control were 36 and 68 % respectively. Pelvic recurrences were most often before 2 years. This series demonstrates the impact of adjuvant irradiation on local control. This impact was stronger if the tumour had a high histologic grade (p<0.01). However, irradiation, as well as chemotherapy, had no impact on the survival.Conclusion. – The study confirmed that irradiation enable a better local control. However modalities of radiation therapy (brachytherapy and/or external beam radiotherapy, dose, volume), are still controversed.     

T3声门型喉鳞状细胞癌手术治疗效果及影响因素分析北大核心

目的:探讨T_(3)声门型喉癌患者行全喉切除术或部分喉切除术的临床效果及影响因素。方法:回顾性分析手术治疗的84例T_(3)声门型喉鳞状细胞癌患者的临床资料,包括性别、年龄、病理学分级、N分期、手术方式、手术切缘、术后放疗、术后咽喉部复发、术后颈部淋巴结复发,评估与喉癌预后的相关性;生存分析采用Kaplan-Meier法计算,单因素分析采用Log-rank检验或者χ^(2)检验,多因素分析采用Cox比例风险回归模型。结果:T_(3)声门型喉癌患者5年总体生存率为75.0%,10年总体生存率为64.7%;部分喉切除术患者5年生存率79.6%,全喉切除术患者5年生存率68.6%;单因素分析显示年龄、病理学分级、手术切缘、N分期、术后咽喉部复发、术后颈部淋巴结复发与T_(3)声门型喉癌的预后相关(P<0.05);多因素分析显示年龄、N分期、手术切缘、肿瘤复发是影响T_(3)声门型喉癌患者生存的独立危险因素(P<0.05)。结论:对于选择的T_(3)声门型喉癌患者,部分喉切除术在保留喉功能的同时可获得较好的肿瘤学效果;精确评估肿瘤范围,保证安全切缘,合理的颈清扫术及术后及时放疗可以提高患者的生存率。     

Postoperative radiotherapy of carcinoma in bilharzial bladder using a three-fractions per day regimen

Patients with T3 bladder cancer who survived surgery and proved to have P3a, P3b or P4a tumors were randomized to either no further treatment (61 patients) or postoperative total pelvic irradiation (55 patients). A three-fraction per day regime was adopted with a dose per fraction of 125 cGy and an interval of 3 h between fractions. The total dose amounted to 3750 cGy divided into 30 fractions over 12 days. Patients of the postoperative radiotherapy group were re-randomized to radiotherapy alone or radiotherapy plus misonidazole (MISO) in a daily dose of 1 g/m2 given orally 2 h before the first daily fraction. The 2-year disease-free survival rate in the cystectomy alone group was 33 +/- 6% compared to 65 +/- 6% in the postoperative radiotherapy group. The therapeutic benefit applied to the two cell types, all histological grades and stages and to patients with or without nodal metastases. The benefit of postoperative irradiation was also verified by the Cox's multivariant analysis which adjusts for the relative representation of the important prognostic factors particularly pathological stage and nodal involvement. MISO did not seem to add to the therapeutic gain. No late complications were encountered in the wall of the rectum, small bowel or uretero-intestinal anastomotic sites. This is suggested to be due to the small dose per fraction used. However, early small bowel reactions were dose-limiting.     

Clinical Predictors of Laryngeal Preservation Rate in Stage III-IV Laryngeal Cancer and Hypopharyngeal Cancer Patients Treated with Organ Preservation

Purpose: To determine factors affecting laryngeal preservation rate in laryngeal and hypopharyngeal cancer patientstreated with organ preservation. Material and Methods: Retrospective study examining stage III to IV laryngeal andhypopharyngeal cancer patients who have been treated with organ preservation. Conventional radiation must be appliedin all patients with minimum dose of 45 Gray. Weekly or triweekly chemotherapy can be adding during radiation. Salvagesurgery should be considered in residual disease or local recurrence. Kaplan-Meier was used for survival analysis and,Log rank test and Cox proportional hazard test were used for uni and multivariate analysis. Results: From January2010 to October 2014, there were 69 patients treated with laryngeal preservation and 53 patients received radiationdose 61-70 Gray. After completing radiation, we found that 44 patients have no residual tumor within 6 months and33 patients can preserve their functional larynx later with complete response (median follow up 6 mo, range 0-46.3mo). The 1-year, 2-year and 3-year laryngeal preservation rate was 49%, 36 % and 32 % respectively. On univariateanalysis, lower nodal stage (p = 0.008), stage III disease (p = 0.046), tumor volume cord involvement (p = 0.016), dose 61-70 Gray (p < 0.001) and no interruption of treatment (p = 0.017) have betterlaryngeal preservation rates. ECOG performance status 2, higher nodal stage, stage IV, presence of true vocal cordinvolvement, upper airway obstruction before/during radiation and radiation dose below 61-70 Gray had an effect onworse overall survival when evaluated with univariate analysis statistical significance. Conclusion: For factors thataffected laryngeal preservation in our study were nodal stage, group stage, tumor volume, true vocal cord involvement,radiation dose and treatment break time more than one week with statistical significance.