Abdominoperineal excision following preoperative radiotherapy for rectal cancer: Unfavorable prognosis even with negative circumferential resection margin

Assessment of risk factors affecting mortality in patients with colorectal cancer

INTRODUCTION

The most important risk factors for colorectal cancer are age, high ASA score, anemia, low albumin, tumor stage, histopathological properties, tumor's relationship with adjacent tissues, positivity of surgical borders and timing of the surgical procedure.

AIM

To determine possible risk factors for mortality in patients undergoing colorectal cancer surgery.

MATERIAL AND METHODS

The medical records of 101 consecutive patients who underwent colorectal cancer surgery at the Department of Surgery, Sutcu Imam University Faculty of Medicine, Kahramanmaras, Turkey between January 2008 and November 2015 were retrospectively reviewed. The patients were divided into two groups: surviving (n = 76) and deceased (n = 25) groups. The groups were compared in terms of several demographic, clinical, biochemical, and histopathological parameters. In addition, risk factors for mortality were analyzed with multivariate analysis. SPSS 22.2, PAST 3, and MedCalc 14 software packages were used for statistical analyses.

RESULTS

The surviving and deceased groups significantly differed with respect to age (p = 0.001), hemoglobin (p = 0.001), lymph node positivity (p = 0.009), positive lymph node/total lymph node ratio (p = 0.012), thrombocyte count (p = 0.047), lymphovascular invasion (p = 0.028), urgency of admission (emergency/elective) (p = 0.036), and postoperative carcinoembryonic antigen (CEA) level (p = 0.002). A receiver operating characteristics curve was drawn to determine the cut-off values of various parameters including age (63), hemoglobin (12.8), node positivity (3), positive/total lymph node ratio (0.435) and thrombocyte count (308), with age (p < 0.001), hemoglobin (p < 0.001), node positivity (p = 0.025) and positive/total lymph node ratio (p = 0.024) being significantly different. A multivariate analysis revealed that age (p = 0.049), hemoglobin (p = 0.045), and positive/total lymph node ratio (p = 0.025) were independent risk factors for mortality.

CONCLUSIONS

This study shows that older age, lower hemoglobin level, and high positive/total lymph node ratio were independent risk factors for mortality among colorectal cancer patients.

Long-term oncologic outcomes of neoadjuvant concurrent chemoradiotherapy with capecitabine and radical surgery in locally advanced rectal cancer: 10-year experiences at a single institution

PURPOSE

Oral capecitabine has demonstrated to be safe and efficient as neoadjuvant concurrent chemoradiotherapy (NCRT) for locally advanced rectal cancers. The aim of this study was to evaluate the long-term oncologic outcomes of NCRT with capecitabine and radical surgery.

METHODS

From January 2000 to June 2010, 238 patients were treated at our center for locally advanced rectal cancers using conventional NCRT with capecitabine and radical surgery. Univariate and multivariate analyses were used to evaluate the factors associated with oncologic outcomes with log rank and Cox regression tests.

RESULTS

The incidence of grade >3 capecitabine-related toxicity was found to be 4.6%. A pathologic complete response was observed in 14.7% of patients. The 5-year overall and 5-year disease-free survival rate, local and systemic recurrence rate were 82.8%, 75.1%, 4.8%, and 20.3%. Abdominoperineal resection and node-positive disease were independent prognostic factors of 5-year overall survival, 5-year disease-free survival, and systemic recurrence.

CONCLUSION

NCRT with capecitabine and radical surgery showed favorable long-term oncologic outcomes with benefits of acceptable toxicity and convenience. We suggest that capecitabine can be one of the favorable therapeutic options for NCRT in rectal cancer.

Outcome of extralevator abdominoperineal excision over conventional abdominoperineal excision for low rectal tumor: a meta-analysis

OBJECTIVE

A meta-analysis was undertaken to provide an evidence-based basis of clinical trials comparing extralevator abdominoperineal excision with conventional abdominoperineal excision for low rectal tumor.

METHODS

We searched through the major medical databases such as PubMed, EMBASE, Medline, Science Citation Index, Web of Science for all published studies without any limit on language from January 2009 until January 2015. The following search terms were used: extralevator abdominoperineal excision or cylindrical abdominoperineal resection or conventional abdominoperineal excision or abdominoperineal excision or rectal cancer. Furthermore, Additional related studies were manually searched in the reference lists of all published reviews and retrieved articles.

RESULTS

In this meta-analysis, there are a total number of 1797 patients included: 1099 patients in the ELAPE group and 698 in the APE group, and there are not statistically differences between groups in CRM [RR=0.65, 95% CI (0.41, 1.04), P=0.07] and wound complications [RR=1.14, 95% CI (1.09, 1.66), P=0.45] between ELAPE and APE. However, ELAPE has a lower rate of intraoperation perforation [RR=0.44; 95% CI (0.33, 0.60); P<0.00001] and local recurrence [RR=0.45, 95% CI (0.27, 0.77), P=0.003] than APE in terms of short follow-up time.