The magnitude of neurotoxicity in patients with multiple myeloma and the impact of dose modifications: results from the population-based PROFILES registry.

The aim of this analysis is to assess (1) self-reported chemotherapy-induced peripheral neuropathy (CIPN) symptoms; (2) its association with sociodemographic and clinical characteristics; and (3) treatment dose modifications and its influence on the magnitude of neurotoxicity in a population-based cohort of patients with multiple myeloma (MM). MM patients (n = 156), diagnosed between 2000 and 2014, filled out the EORTC QLQ-CIPN20 (65% response). Data on treatment, outcomes, and dose modifications were extracted from the medical files. Fifty-three percent of patients reported at least one and on average three neuropathy symptoms that bothered them the most during the past week, with tingling toes/feet as most reported. In multivariate analysis, thalidomide, especially higher cumulative dose, was associated with neuropathy (ß = 0.26, CI 95% 0.27-15.34, p = 0.04) and CIPN was not associated with age, sex, time since last course of therapy, number of prior therapies, osteoarthritis, or diabetes. Dose modifications were often applied (65%). Although not statistically significant, a trend towards higher sensory (22 vs. 15 vs. 12, p = 0.22) and motor neuropathy scores (21 vs. 15 vs. 11, p = 0.36) was observed among patients receiving dose modification because of CIPN (31%) compared to those receiving a dose modification for another reason or no dose modification, without altering treatment response. CIPN is a common dose limiting side effect in patients with MM. Severity of CIPN was mainly affected by treatment with thalidomide. In spite of dose modifications, patients still reported somewhat higher neuropathy scores without altered response rates. Early dose modification based on a more reliable tool for CIPN measurements may prove value.

Peripheral neuropathy in colorectal cancer survivors: the influence of oxaliplatin administration. Results from the population-based PROFILES registry.

BACKGROUND: Chemotherapy-induced peripheral neuropathy (CIPN) is a dose-limiting side effect of oxaliplatin which can negatively influence quality of life. We aimed to study the influence of cumulative dose, dose schedule and dose reductions of adjuvant oxaliplatin on long-term severity and prevalence of CIPN among colorectal cancer (CRC) survivors. MATERIAL AND METHODS: In total 207 patients, diagnosed with CRC between 2000 and 2009 who underwent adjuvant treatment with oxaliplatin, were included. They completed the EORTC QLQ-CIPN20 2-11 years after diagnosis. Data on oxaliplatin administration and acute neuropathy during treatment were extracted from the medical files. Subscales were analyzed with analysis of covariance and neuropathy symptoms with logistic regression analysis. RESULTS: Patients who received cumulative oxaliplatin dose of ≥ 842 mg/m(2) had a significantly worse EORTC QLQ-CIPN20 sensory score compared to those who received a low cumulative dose of < 421 mg/m(2) (mean 19 vs. 8; p = 0.02). They more often reported tingling toes/feet (13% vs. 2%, respectively; p = 0.01). Dose intensity and time delay did not influence the occurrence of CIPN. Patients receiving a dose reduction because of neuropathy (N = 50) reported a significantly worse sensory score at very similar cumulative doses, than those who did not receive a dose reduction because of neuropathy (N = 96) (mean 21 vs. 15; p = 0.01). CONCLUSION: Cumulative dose of oxaliplatin is associated with long-term CIPN. The risk of developing long-term CIPN could only be reduced by decreasing the cumulative dose, whereas delay probably is not beneficial. Patients receiving a dose reduction because of acute neuropathy are still at risk of developing long-term CIPN. Future studies should focus on identifying patients who are at risk of developing CIPN.

Chemotherapy-induced peripheral neuropathy, physical activity and health-related quality of life among colorectal cancer survivors from the PROFILES registry.

PURPOSE: To gain insight into the association of physical activity (PA), chemotherapy-induced peripheral neuropathy (CIPN) and health-related quality of life among colorectal cancer survivors, up to 11 years after diagnosis. METHODS: Data of the second data wave of a Dutch prospective population-based survey among colorectal cancer survivors diagnosed between 2000 and 2009 as registered by the Eindhoven Cancer Registry was used. Eighty-three percent (n = 1648) of patients filled out the EORTC QLQ-C30 and the EORTC QLQ-CIPN20 of which 506 patients (31%) were treated with chemotherapy. RESULTS: Treatment with chemotherapy was associated with a higher percentage of patients reporting CIPN symptoms regardless of PA. Furthermore, not meeting the Dutch PA guideline of 150 min of moderate to vigorous PA a week was associated with more CIPN among patients treated with chemotherapy. Also patients not treated with chemotherapy reported CIPN-like symptoms, especially when not meeting the PA guideline. Statistically significant and clinically relevant worse scores on almost all EORTC QLQ-C30 subscales were reported by those not meeting the PA guideline compared to those who did meet the guideline, regardless of CIPN symptoms. However, these differences were more pronounced in the group with many CIPN symptoms (e.g. upper 30%). IMPLICATIONS FOR CANCER SURVIVORS: Alertness among health care professionals and patients for the importance of PA is warranted, as meeting the PA guideline was associated with less CIPN-like symptoms and a higher health-related quality of life regardless of treatment with chemotherapy.

[Chemotherapy-induced peripheral neuropathy; impact on quality of life]. / Chemotherapie-geïnduceerde perifere neuropathie; invloed op kwaliteit van leven.

Peripheral neuropathy is a frequently occurring side-effect of chemotherapy as a cancer treatment. The incidence of chemotherapy-induced peripheral neuropathy (CIPN) is increasing as a consequence of better treatment of cancer becoming available and increasing use of chemotherapy, and because CIPN occurs more frequently with use of new chemotherapeutics. The diagnosis 'CIPN' is made principally on clinical grounds, and it is characterized by predominantly sensory symptoms. The National Cancer Institute Common Toxicity Criteria (NCI-CTC) are commonly used to grade CIPN, but the reliability of these criteria is debated. If CIPN occurs, the only effective strategies are dose reduction or discontinuation of chemotherapy. CIPN impairs quality of life. It is important to evaluate the symptoms of CIPN, as well as the impact on daily living.