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K Thomas Robbins

Publications and source records attributed to K Thomas Robbins.

43 records · Page 3Linked to original sources

Hypopharyngeal carcinoma.

For more than 20 years, the policy at the University of Florida has been to treat patients with favorable stage T1-T2 pyriform sinus carcinoma by using radiation therapy alone, or with a planned neck dissection if advanced nodal disease is present. This approach usually leaves the patient with nearly normal swallowing and speech, and provides bilateral coverage of the regional neck and retropharyngeal lymphatics. More advanced lesions often are not controlled with radiation alone and are usually considered for partial or total laryngopharyngectomy if the patient is medically operable. Radiation is usually administered postoperatively in this setting, unless the neck disease is thought to be unresectable, in which case preoperative radiation is given. Recent data have shown that adjuvant chemotherapy administered concomitantly with radiotherapy results in improved cure rates for patients with advanced disease compared with irradiation alone. Time-honored established guidelines are still used, although the edges have become blurred. Therefore, patients with larger primary tumors now may be considered for organ preservation treatment with irradiation and chemotherapy, reserving surgery for salvage situations. The subset of patients with advanced T4 pyriform sinus cancers (in whom cure with chemoradiation would likely result in tracheostomy and/or gastrostomy dependence) may be better served with elective surgery and postoperative irradiation. The definition of this subset of patients is unclear but probably includes patients with significant cartilage destruction and those who require pretreatment tracheostomy. The policy at the University of Florida is to treat essentially all pharyngeal wall cancers with external-beam irradiation alone.

Carcinoma, Squamous Cell↗

Factors predictive of poor functional outcome after chemoradiation for advanced laryngeal cancer.

OBJECTIVE: The study goal was to determine whether pretreatment parameters can be used to predict poor outcomes related to laryngeal function among survivors after organ preservation therapy for advanced laryngeal cancer. DESIGN: A retrospective analysis of patients treated in an ongoing chemoradiation trial. SETTING: Academic tertiary care referral medical center. PATIENDS AND METHODS: Among the 65 patients receiving concomitant intra-arterial cisplatin and radiation therapy for stage III and IV laryngeal cancer between 1993 and 1999, we identified 45 who were available for follow-up and were disease free 6 months after the completion of therapy. A nominal logistic regression analysis was performed to study the effect of age, gender, T and N classification, vocal cord fixation, massive cartilage destruction, and neck dissection on the likelihood of requiring a tracheostomy tube for breathing and/or a gastrostomy tube for feeding at 6 months after the completion of therapy. MAIN OUTCOME MEASURE: Persistent use of gastrostomy tube feedings and/or tracheostomy at 6 months after the completion of therapy. RESULTS: Sixteen patients (36%) required a feeding tube and/or a tracheostomy (tracheostomy 13, gastrostomy 13, both 10). Regression analysis of all pretreatment factors indicated vocal cord fixation as being the strongest predictor of a poor functional outcome (defined as the persistent need for a feeding tube and/or tracheostomy at 6 months after therapy). Among the 27 patients in this subset, 15 (56%) had a poor functional outcome. In contrast, only 1 (6%) of 18 patients without vocal cord fixation had poor laryngeal function. Although the history of pulmonary disease was not a significant parameter by itself, when combined with vocal cord fixation, 6 of 8 patients had a poor functional outcome. CONCLUSION: Pretreatment parameters may be used to predict a poor functional outcome after chemoradiation. Because of the high likelihood of poor function, laryngeal cancer patients seeking organ preservation therapy with chemoradiation should be cautioned if they present with a fixed vocal cord.

Aged↗

Tumor volume predicts outcome for advanced head and neck cancer treated with targeted chemoradiotherapy.

OBJECTIVES/HYPOTHESIS: Just as tumor volume is a prognostic indicator for local disease control among patients with head and neck cancer of intermediate size treated with radiation therapy, we hypothesized a similar association for patients with advanced disease treated with chemoradiation therapy. STUDY DESIGN: Retrospective analysis of primary and nodal tumor volume was correlated with prospectively collected treatment outcome measures. METHODS: Sixty-four patients with stage III-IV disease who were treated with targeted intra-arterial chemotherapy and radiation therapy (RADPLAT) were studied. Tumor volume was correlated with local disease control and survival. RESULTS Primary tumor volume correlated with local disease control and survival. The greatest risk for local failure was found among patients with primary tumor volume greater than 19.6 cc (93.8% vs. 57% [P =.001]). A nominal logistic regression analysis demonstrated primary tumor volume as being the only significant parameter related to local failure. Survival was only 14.1% among patients with primary tumor volume greater than 19.6 cc compared with 41.5% for patients with volumes less than 19.6 cc ( P=.0018). A proportional hazard model indicated that the most significant and independent parameters associated with survival were primary tumor volume ( P=.0007) and the site of the tumor ( P=.05). CONCLUSION: Tumor volume is the most important factor predictive of treatment outcome among patients with advanced head and neck cancer and should be used to stratify favorable versus unfavorable patient subsets.

Adult↗