Deficient mismatch repair phenotype is a prognostic factor for colorectal cancer in elderly patients.

OBJECTIVE: About 15% of colorectal adenocarcinomas have a deficient DNA mismatch repair phenotype. The frequency of deficient DNA mismatch repair tumours increases with age due to the hypermethylation of hMLH1 promoter. The study aimed to determine the prognostic value of deficient DNA mismatch repair phenotype in elderly patients. DESIGN: Mismatch repair phenotype was retrospectively determined by molecular analysis in consecutive resected colorectal adenocarcinoma specimens from patients over 75 years of age from 4 Oncology centres. RESULTS: 231 patients (median age: 81, range: 75-100) were enrolled from 2005 to 2008. Mean prevalence of deficient DNA mismatch repair phenotype was 22.5%, and 36% for patients over 85 years. Deficient DNA mismatch repair status was significantly associated with older age, female sex, proximal colon primary and high grade tumour. For stage II tumours no deficient DNA mismatch repair tumours had a recurrence at end of follow-up compared to 17% for tumours with proficient phenotype. The proficient phenotype status was significantly associated with worse age-adjusted overall survival [HR 2.60; 95% CI 1.05-6.44; p=0.039]. For stage III tumours a trend for less recurrence was observed for deficient DNA mismatch repair phenotype (16%) compared to proficient phenotype (36%). CONCLUSION: deficient DNA mismatch repair phenotype is a prognostic factor in stage II colorectal tumour in elderly patients. Our results suggest that mismatch repair phenotype should be taken in consideration for adjuvant chemotherapy decision in elderly patients.

Value of a systematic operative protocol for cocaine body packers.

BACKGROUND: Internal concealment of illicit drugs during international drug traffic represents an important problem in developed countries. These drug traffickers are called "body packers." The aim of this study was to analyze retroprospectively the surgical indications and complications for cocaine body packers and to describe our systematic operative protocol. METHODS: From January 1997 to December 2005, 1,181 cocaine body packers were admitted to our Medico-Judiciary Emergency Department. All patients had the same medical surveillance protocol. Nineteen patients required surgical procedure to remove drug packets. RESULTS: Thirteen patients had obstruction or intestinal retention (68%). Suspicion of packet rupture or cocaine intoxication occurred in six patients (32%). Zero to three enterotomies were necessary during laparotomy. No deaths occurred. One pouch abscess required relaparotomy and one wound abscess was treated medically. The median hospital stay was 7 days (range: 5-30 days). CONCLUSIONS: Few cocaine body packers required a laparotomy. Our systematic operative protocol allowed intestinal clearance and caused acceptable morbidity rate.