The objective of this study was to examine the accuracy of a 12 MHz ultrasound catheter probe in the pre-operative staging of colorectal cancer by assessing the depth of tumour infiltration and involvement of pericolonic lymph nodes. 159 patients with colorectal cancer who underwent ultrasound examination with a 12 MHz catheter probe were studied prospectively. The results of this imaging procedure were compared with the histological findings of the resected specimens. The accuracy of the 12 MHz ultrasound catheter probe for depth of invasion (T category) was 85% (131/154) for all tumours, 87% (46/53) for pT1 tumours, 60% (9/15) for pT2 tumours, 89% (74/83) for pT3 tumours and 67% (2/3) for pT4 tumours. The accuracy for tumours of the rectum and colon was 81% and 89%, respectively. The accuracy of the probe for nodal staging (N category) was 67% (76/114) overall. The sensitivity was 70% (33/47), the specificity 64% (43/67), the positive predictive value 58% (33/57) and the negative predictive value 75% (43/57). Endoscopic ultrasound using a 12 MHz catheter probe accurately assessed tumour stage, although nodal staging remained suboptimal. This method may aid in the selection of treatment for patients with colorectal cancer.
IntroductionRegorafenib is an oral multikinase inhibitor for the treatment of metastatic colorectal cancer (mCRC). The clinical factors that may affect adherence to regorafenib remain unclear. The aim of this study was to evaluate adherence to regorafenib with mCRC and to identify factors that might affect adherence to regorafenib.MethodsA total of 108 consecutively enrolled Japanese patients with mCRC received regorafenib. Adherence was measured by pharmacists using pill counts and a self-reported treatment diary for patients at a pharmaceutical outpatient clinic. The median relative dose intensities of regorafenib and the factors adversely affecting adherence were retrospectively surveyed. Logistic regression analysis was then performed using patient socio-demographic factors and clinical factors.ResultsA total of 96 patients were included in the analysis. The median adherence rate was 61.7% in the first cycle. The median relative dose intensity was 57.1%. The most common reason for non-adherence was a hand-foot-skin reaction (35.6%). On multivariate analysis, increased non-adherence to regorafenib was significantly associated with sex (female) [odds ratio (OR) = 4.36; 95% confidence interval (CI): 1.43–13.22, p = 0.01].DiscussionHand-foot-skin reactions and female sex were associated with lower adherence to regorafenib. Since these factors could be associated with lower adherence to regorafenib, it would be useful to consider these factors when assessing adherence.
783 Background: Regorafenib is an oral multikinase inhibitor for metastatic colorectal cancer (mCRC) and it is frequently involved in various adverse events. The clinical factors affecting adherence to regorafenib remain unclear. The aim of this study is to evaluate adherence to regorafenib in patients with mCRC and to identify candidate factors which might have influence on adherence to regorafenib. Methods: We evaluated 106 consecutively enrolled patients with mCRC who received regorafenib between May 18, 2013 and March 2, 2015 at the Cancer Institute Hospital of the Japanese Foundation for Cancer Research. Adherence to regorafenib was checked by pharmacists using a self-reported treatment diary for patients at a pharmaceutical outpatient clinic. The adherence rate was defined as the number of actual intakes per 21 intakes scheduled in each cycle. We retrospectively surveyed median relative dose intensities of regorafenib and the factors deteriorating adherence across three cycles. Univariate analyses were then performed using patient socio-demographic factors and clinical factor. Multivariate analysis was performed using logistic regression. Significance levels for uni- and multivariate analyses were p < 0.2 and p< 0.05, respectively. Results: A total of 81 patients were evaluated in the study analysis. Adherence rates were 64.4% in the first cycle of regorafenib treatment, 77.4% in the second cycle, and 83.8% in the third cycle. The median relative dose intensity was 57.6%. The most common reasons for non-adherence were hand-foot skin reaction (34.3%, 331 instances), and liver dysfunction (15.3%, 148 instances). In multivariate analysis, increased non-adherence to regorafenib was significantly associated with gender (female) [odds ratio (OR) = 0.20; 95% confidence interval (CI): 0.06-0.68, p = 0.01] and adverse events ( ≥ Grade 3) [OR = 3.16; 95% CI: 1.00-9.97, p= 0.04) in the first cycle.] Conclusions: The high frequency of treatment-related hand-foot skin reaction and liver dysfunction is the main factor affecting adherence to regorafenib. Intensive supportive care in the management of these symptoms could assist adequate adherence to regorafenib.
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