A systematic review of smell alterations after radiotherapy for head and neck cancer

PURPOSE

To review the current knowledge on radiotherapy associated olfactory dysfunction among head and neck cancer (HNC) patients.

METHODS

A systematic review of RT-related olfactory dysfunction in HNC was performed. Searches were conducted in several databases (Medline, EMBASE, CINAHL, CAB Abstracts, SCOPUS, Proquest Dissertations and Theses, PROSPERO, ALLEBM Reviews - Cochrane DSR, ACP Journal Club, DARE, CCTR, CMR, HTA, and NHSEED). Publications investigating olfactory dysfunction as an explicit side effect of Radiotherapy (RT, or RT-chemo or RT-monoclonal antibodies) were eligible, no limits were applied.

RESULTS

Two hundred and twenty-nine papers were screened and 23 met inclusion criteria.

CONCLUSIONS

Odor detection, identification and discrimination are olfactory functions impaired after RT for HNC. An RT dose-effect has been calculated for odor identification and odor discrimination. There were no studies of the effect of olfactory dysfunction on weight loss or energy intake among RT-treated HNC patients. To improve our understanding of RT associated olfactory dysfunction among HNC patients, future studies should include a multi-dimensional assessment of olfactory function in a longitudinal design, track other conditions affecting olfaction, assess retronasal olfactory perception, adopt validated self-report tools and explore the impact of olfactory dysfunction on the eating experience of HNC patients.

The impact of taste and smell alterations on quality of life in head and neck cancer patients

PURPOSE

Taste and smell alterations (TSAs) are among the most frequent and troublesome symptoms reported by head and neck cancer (HNC) patients after treatment. Little is known about the relationship between TSAs and quality of life (QoL) among HNC patients. The aim of this study was to determine the effect of TSAs on overall QoL among tube-fed and orally fed HNC patients before treatment, at end of treatment and at 2.5-month follow-up.

METHODS

Data were collected in a longitudinal study prior to treatment (n = 126), at end of treatment (n = 100) and at 2.5-month follow-up (n = 85). Chemosensory Complaint Score (CCS) and the University of Washington Quality of Life Questionnaire version 3 were used to assess TSAs and QoL, respectively. Generalized estimated equation modeling was used to estimate the effect of CCS on QoL.

RESULTS

At end of treatment, QoL and CCS had declined for both tube-fed and orally fed patients and thereafter improved, but not to pre-treatment levels. Neither QoL nor CCS mean scores were different between the two groups at any time point. CCS was a significant predictor of overall QoL (β = -1.82, p < 0.0001), social-emotional (β = -1.76, p < 0.0001), physical (β = -1.12, p < 0.0001) and overall functions (β = -1.15, p < 0.0001) at a multivariate level. Taste was reported as an important symptom for both tube-fed and orally fed groups at end of treatment and follow-up.

CONCLUSIONS

TSAs are an important symptom and an independent predictor of QoL for both tube-fed and orally fed HNC patients. HNC patients need support to manage TSAs, regardless of the method of nutritional intake.

Health care delivery for head-and-neck cancer patients in Alberta: a practice guideline

BACKGROUND

The treatment of head-and-neck cancer is complex and requires the involvement of various health care professionals with a wide range of expertise. We describe the process of developing a practice guideline with recommendations about the organization and delivery of health care services for head-and-neck cancer patients in Alberta.

METHODS

Outcomes of interest included composition of the health care team, qualification requirements for team members, cancer centre and team member volumes, infrastructure needs, and wait times. A search for existing practice guidelines and a systematic review of the literature addressing the organization and delivery of health care services for head-and-neck cancer patients were conducted. The search included the Standards and Guidelines Evidence (sage) directory of cancer guidelines and PubMed.

RESULTS

One practice guideline was identified for adaptation. Three additional practice guidelines provided supplementary evidence to inform guideline recommendations. Members of the Alberta Provincial Head and Neck Tumour Team (consisting of various health professionals from across the province) provided expert feedback on the adapted recommendations through an online and in-person review process. Selected experts in head-and-neck cancer from outside the province participated in an external online review.

SUMMARY

The recommendations outlined in this practice guideline are based on existing guidelines that have been modified to fit the Alberta context. Although specific to Alberta, the recommendations lend credence to similar published guidelines and could be considered for use by groups lacking the resources of appointed guideline panels. The recommendations are meant to be a guide rather than a fixed protocol. The implementation of this practice guideline will depend on many factors, including but not limited to availability of trained personnel, adequate funding of infrastructure, and collaboration with other associations of health care professionals in the province.

RK-0202 for radiation-induced oral mucositis

5523

Background: This study evaluated the effect of RK-0202, administered as an oral rinse, on the incidence of severe oral mucositis in patients being treated with of radiation therapy (RT) for tumors of the head and neck. Methods: This was a prospective, randomized, placebo-controlled, double-blind study that compared the effect of 2 concentrations of RK-0202 with placebo on the incidence of severe oral mucositis at a cumulative RT dose of 60 Gy in 110 subjects. Twenty-seven subjects received RK-0202 5%, 38 received RK-0202 10%, 29 received placebo and 16 received standard of care. Subjects began dosing just prior to RT and continued dosing six times daily throughout RT. Oral mucositis was assessed twice weekly throughout RT by trained oral evaluators. Results: The higher dose of RK-0202 (10%) successfully attenuated severe oral mucositis as measured by WHO or NCI-CTC v.3 criteria. The incidence of WHO grade 3 or 4 oral mucositis by a cumulative RT dose of 60 Gy was 35% in the RK-0202 group vs. 54% in the placebo group (p = NS). By 50 Gy the incidences in the RK-0202 and placebo groups were 25% and 54%, respectively (p = 0.053). Similarly, the incidence of NCI grade 3 or 4 oral mucositis by 60 Gy was 64% in the RK-0202 cohort vs. 92% for subjects being treated with placebo (p = 0.005). Subjects treated with RK-0202 required less feeding tube placement compared to placebo recipients (3% vs. 22%, p = 0.037) and less opiate analgesia. The median percent of time on opiates was 6% on RK-0202 vs. 21% on placebo. The overall incidence of serious adverse events was significantly lower in subjects treated with RK-0202 (8% vs. 31%, p = 0.024). In general, there was no benefit noted among subjects who received RK-0202 as a 5% solution. Conclusions: RK-0202 significantly reduced the incidence of severe mucositis in subjects treated with radiotherapy for head and neck cancer and was not associated with significant adverse events.

[Table: see text]

Muscle-invasive transitional cell carcinoma of the urinary bladder: a population-based study of patterns of care and prognostic factors

PURPOSE

Population-based cancer registries can permit the study of the survivorship of all patients with a particular diagnosis regardless of patterns of referral and practice within a specific geographic distribution. The purpose of this study is to describe the patterns of care, outcome, and prognostic factors for bladder cancer in the northern region of the province of Alberta, Canada, between 1984 and 1993.

METHODS AND MATERIALS

Between 1984 and 1993, 184 patients from northern Alberta were identified from the Alberta Cancer Registry as having undergone curative treatment for biopsy-proven muscle-invasive transitional cell carcinoma of the bladder. Data were obtained, by retrospective chart review, regarding the staging, pathology, treatment, and outcome of patients treated in the northern Alberta cities of Edmonton, Grande Prairie, and Red Deer, regardless of the responsible treating institution. The prognostic significance of patient-, tumor-, and treatment-related variables were tested using univariate and multivariate analysis using the Cox proportional-hazard model.

RESULTS

As the primary treatment modality, 74 patients (40%) received radical radiotherapy (RT) without surgery; surgery was used alone in 81 patients (44%), and was combined with preoperative or postoperative radiotherapy in 29 patients (16%). Seventy-three (40%) patients also received concurrent, neoadjuvant, or adjuvant chemotherapy. The Kaplan-Meier estimate of median survival was 2.2 years, and the 5-year overall survival was 30%. Univariate analysis demonstrated the prognostic significance of T classification (p < 0.001), lymph node involvement (p < 0.001), complete response to RT (p = 0.001), hydronephrosis (p = 0.017), and vascular/lymphatic involvement (p = 0.035). Multivariate analysis revealed the following to have a significant association with survival: T classification (p = 0.001), lymph node involvement (p = 0.004), complete response to RT (p = 0.054), hydronephrosis (p = 0.019), and use of chemotherapy in the treatment regimen (p = 0.025).

CONCLUSION

The strongest prognostic factors in this study were tumor related, and no significant differences in survival were detected between patients treated with primary surgery vs. organ-preservation approaches. A survival advantage associated with the incorporation of chemotherapy into the management schema was detected on multivariate, but not univariate, analysis. Stratification of patients based on tumor characteristics is imperative in clinical trials for invasive bladder cancer. Novel treatment approaches are required to improve survival further in patients with apparently localized disease.

CT-targeted irradiation of the breast and internal mammary lymph nodes using a 5-field technique

PURPOSE

To develop an effective and resource-efficient radiotherapy technique to treat the breast and regional nodes, including the ipsilateral internal mammary nodes.

METHODS AND MATERIALS

Eighty female patients who underwent MRI scans for a variety of indications had coronal, T1-weighted images of the chest performed to determine the position of the internal mammary chain (IMC). Based on these results, a 5-field treatment technique was developed that would include the breast, supraclavicular fossa, and ipsilateral IMC, while maintaining a low dose to the heart, lungs, and contralateral breast. This technique was implemented in a cohort of 13 patients.

RESULTS

The lateral position of the right and left IMC were measured in three cephalo-caudad positions: at the clavicular heads, upper manubrium, and midsternum (at the 2nd/3rd rib interspace). The mean lateral separation between the right and left IMC chains at each level (and 95% confidence interval) at each level were 5.8 cm (4.67-7.00), 5.6 cm (4.49-6.73), and 5.9 cm (4.66-7.19), respectively. Treatment was delivered to 13 patients using a 5-field technique, with tangential photon fields for the breast, anterior and posterior supraclavicular/axillary field, and a matching anterior electron field. Three-dimensional treatment planning of a representative case confirmed adequate coverage of the planning target volume (PTV). The median dose to the whole heart was 10 Gy, and 20% of the ipsilateral lung received more than 20 Gy. Seven of the 13 patients treated experienced moist desquamation at the junction of the electron field and breast tangents, and 1 patient had persistent ulceration at 3 months' follow-up.

CONCLUSION

The 5-field technique described in this paper provides good coverage to the breast and regional nodes with acceptable toxicity, and without requiring three-dimensional treatment planning or intensity-modulated radiotherapy techniques.