ICD-9International Classification of Diseases, Ninth RevisionInternational Classification of Diseases, Ninth RevisionSEERSurveillance, Epidemiology and End ResultsSurveillance, Epidemiology and End ResultsTo determine whether the risk of colorectal cancer (CRC) decreases after colonoscopy compared with sigmoid...
Cases of stage pT4b sigmoid colon cancer were screened in the SEER database by SEER‐Stat software (SEER*Stat 8.3.8). Cases of sigmoid colon cancer were retrieved based on the International Classification of Diseases for Oncology (ICD-O-3) code; namely, “Site recode ICD-O-3/WHO 2008" ...