Initial experience of radiotherapy plus cetuximab for Japanese head and neck cancer patients

Real-world clinical outcomes in Japanese patients with locally advanced squamous cell carcinoma of the head and neck treated with radiotherapy plus cetuximab: a prospective observational study (JROSG12-2)

BACKGROUND

Radiotherapy plus cetuximab (bioradiotherapy: BRT) is a standard option in the treatment of locally advanced squamous cell carcinoma of the head and neck (LA-SCCHN). Published data on its safety and efficacy in real-world settings is limited. Here, we conducted a prospective multi-institutional observational study to evaluate clinical outcomes of BRT in patients with LA-SCCHN.

METHODS

We analyzed real-world data of all patients who underwent BRT from 2013 to 2016. The primary endpoint was 1-year progression-free survival (PFS). Secondary endpoints were 1-year locoregional PFS (LPFS), treatment completion rate (TCR), and adverse events (AEs).

RESULTS

A total of 171 patients with a minimum 1-year follow-up were analyzed. Median age was 67 (36-85) years, and 37 patients (21.6%) were aged 75 years or older. 1-year PFS and LPFS were 51.5 and 56.1%, respectively. N stage (p = 0.049) was significantly associated with PFS. TCR was 77.2%. Cetuximab was definitively discontinued in 30 patients (17.5%), in 15 cases due to severe mucositis. N stage, T stage, and comorbidity were significantly associated with TCR. Major AEs of grade 3 or higher were pharyngeal mucositis (48.5%), radiation dermatitis (45.6%), and oral mucositis (40.4%). Pneumonitis was observed in 12 patients (7.0%); 6 cases (3.5%) were grades 3-4 and 2 (1.2%) were grade 5.

CONCLUSION

As a result of the large number of elderly patients in clinical practice,　toxicity reduced TCR. BRT-induced pneumonitis, which is sometimes fatal, was found to be more frequent than with chemotherapy plus cetuximab.

Patient-reported symptoms and stepwise symptom management in patients on epidermal growth factor inhibitors: A retrospective, descriptive cohort study

Adverse events (AEs) of epidermal growth factor inhibitors (EGFRi) influence well-being with a risk to dose modifications (DMs). Hereby, clinical benefit of treatment might be affected. This retrospective cohort study was set up to gain insight into the suitability and added value of a patient-reported outcome measurement tool (PROM), together with a stepwise intervention management plan for EGFRi-related AEs in daily practice. The primary objective was to gain insight into total treatment duration and DMs, and the secondary objective to gain insight into patient-reported symptoms and well-being as well as healthcare professional-reported AEs. Sixty-eight patients on cetuximab and 19 on panitumumab treatment were included for analysis; 69% had squamous cell carcinoma of head and neck (SCCHN) and 26% metastatic colorectal carcinoma. DMs due to AEs occurred in 39% of the patients and dose discontinuations in 22%. Especially anorexia, dysphagia, oral pain and skin changes led to a decreased well-being. In patients on EGFRi, application of PROMs together with a stepwise symptom management plan enhances early recognition of symptom burden, pro-active symptom management and effect evaluation of interventions performed whereby well-being recovers. Since only SCCHN patients discontinued treatment due to AEs, patient-centred care focused on radiotherapy-related AEs, creates opportunities for amelioration.

Targeted therapy in esophageal cancer

An increasing number of patients are diagnosed with esophageal cancer at an advanced stages, and only a small group of them can benefit from the traditional chemotherapy and radiotherapy. So far, multiple monoclonal antibodies and tyrosine kinase inhibitors have been developed, alone or in combination with traditional therapy, to improve the prognosis of patients with advanced esophageal cancer. This review summarizes the recent advances of targeted therapies against EGFR, HER2, VEGFR and c-MET in esophageal cancer. More clinical trials should be performed to evaluate the efficacy and safety of various targeted therapy regimens. Future basic research should focus on investigating the molecular mechanisms of therapeutic targets in esophageal cancer.

Artificial nutrition dependence after cetuximab versus cisplatin combined with radiotherapy for advanced head and neck cancer: A propensity score-matched analysis

BACKGROUND

The purpose of this study was to compare the effect of cetuximab-based radiotherapy (RT) with cisplatin-based concomitant chemoradiotherapy (CCRT) on artificial nutrition dependence in locoregional advanced head and neck cancer.

METHODS

We identified patients treated with cetuximab-based RT or CCRT between 2012 and 2014 in a Japanese national database, and used propensity score-matched analyses to evaluate artificial nutrition dependence for 30 days after starting chemotherapy and at hospital discharge.

RESULTS

Of 3935 eligible patients, propensity score matching generated 250 pairs. Thirty-day artificial nutrition dependence was significantly lower in the cetuximab-based RT group than in the CCRT group (25.6% vs 35.2%; odds ratio [OR] = 0.67; 95% confidence interval [CI] = 0.46-0.97; p = .036). No significant difference in artificial nutrition dependence at hospital discharge was shown (6.2% vs 7.2%; OR = 1.07; 95% CI = 0.52-2.17; p = .861). Difference in duration of hospitalization was insignificant.

CONCLUSION

Cetuximab-based RT may reduce short-term artificial nutrition dependence compared to CCRT. © 2016 Wiley Periodicals, Inc. Head Neck 39: 320-325, 2017.