TY - JOUR
T1 - Characteristics of missed or interval colorectal cancer and patient survival
T2 - A population-based study
AU - Samadder, N. Jewel
AU - Curtin, Karen
AU - Tuohy, Thérèse M.F.
AU - Pappas, Lisa
AU - Boucher, Ken
AU - Provenzale, Dawn
AU - Rowe, Kerry G.
AU - Mineau, Geraldine P.
AU - Smith, Ken
AU - Pimentel, Richard
AU - Kirchhoff, Anne C.
AU - Burt, Randall W.
PY - 2014/4
Y1 - 2014/4
N2 - Background & Aims Colorectal cancers (CRCs) diagnosed within a few years after an index colonoscopy can arise from missed lesions or the development of a new tumor. We investigated the proportion, characteristics, and factors that predict interval CRCs that develop within 6-60 months of colonoscopy. Methods We performed a population-based cohort study of Utah residents who underwent colonoscopy examinations from 1995 through 2009 at Intermountain Healthcare or the University of Utah Health System, which provide care to more than 85% of state residents. Colonoscopy results were linked with cancer histories from the Utah Population Database to identify patients who underwent colonoscopy 6-60 months before a diagnosis of CRC (interval cancer). Logistic regression was performed to identify risk factors associated with interval cancers. Results Of 126,851 patients who underwent colonoscopies, 2659 were diagnosed with CRC; 6% of these CRCs (159 of 2659) developed within 6 to 60 months of a colonoscopy. Sex and age were not associated with interval CRCs. A higher percentage of patients with interval CRC were found to have adenomas at their index colonoscopy (57.2%), compared with patients found to have CRC detected at colonoscopy (36%) or patients who did not develop cancer (26%) (P <.001). Interval CRCs tended to be earlier-stage tumors than those detected at index colonoscopy, and to be proximally located (odds ratio, 2.24; P <.001). Patients with interval CRC were more likely to have a family history of CRC (odds ratio, 2.27; P =.008) and had a lower risk of death than patients found to have CRC at their index colonoscopy (hazard ratio, 0.63; P <.001). Conclusions In a population-based study in Utah, 6% of all patients with CRC had interval cancers (cancer that developed within 6 to 60 months of a colonoscopy). Interval CRCs were associated with the proximal colon, earlier-stage cancer, lower risk of death, higher rate of adenoma, and family history of CRC. These findings indicate that interval colorectal tumors may arise as the result of distinct biologic features and/or suboptimal management of polyps at colonoscopy.
AB - Background & Aims Colorectal cancers (CRCs) diagnosed within a few years after an index colonoscopy can arise from missed lesions or the development of a new tumor. We investigated the proportion, characteristics, and factors that predict interval CRCs that develop within 6-60 months of colonoscopy. Methods We performed a population-based cohort study of Utah residents who underwent colonoscopy examinations from 1995 through 2009 at Intermountain Healthcare or the University of Utah Health System, which provide care to more than 85% of state residents. Colonoscopy results were linked with cancer histories from the Utah Population Database to identify patients who underwent colonoscopy 6-60 months before a diagnosis of CRC (interval cancer). Logistic regression was performed to identify risk factors associated with interval cancers. Results Of 126,851 patients who underwent colonoscopies, 2659 were diagnosed with CRC; 6% of these CRCs (159 of 2659) developed within 6 to 60 months of a colonoscopy. Sex and age were not associated with interval CRCs. A higher percentage of patients with interval CRC were found to have adenomas at their index colonoscopy (57.2%), compared with patients found to have CRC detected at colonoscopy (36%) or patients who did not develop cancer (26%) (P <.001). Interval CRCs tended to be earlier-stage tumors than those detected at index colonoscopy, and to be proximally located (odds ratio, 2.24; P <.001). Patients with interval CRC were more likely to have a family history of CRC (odds ratio, 2.27; P =.008) and had a lower risk of death than patients found to have CRC at their index colonoscopy (hazard ratio, 0.63; P <.001). Conclusions In a population-based study in Utah, 6% of all patients with CRC had interval cancers (cancer that developed within 6 to 60 months of a colonoscopy). Interval CRCs were associated with the proximal colon, earlier-stage cancer, lower risk of death, higher rate of adenoma, and family history of CRC. These findings indicate that interval colorectal tumors may arise as the result of distinct biologic features and/or suboptimal management of polyps at colonoscopy.
KW - Colon Cancer
KW - Detection
KW - Missed or Interval Cancer
KW - Screening
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UR - http://www.scopus.com/inward/citedby.url?scp=84896446711&partnerID=8YFLogxK
U2 - 10.1053/j.gastro.2014.01.013
DO - 10.1053/j.gastro.2014.01.013
M3 - Article
C2 - 24417818
AN - SCOPUS:84896446711
SN - 0016-5085
VL - 146
SP - 950
EP - 960
JO - Gastroenterology
JF - Gastroenterology
IS - 4
ER -