The primary objective of this study is to gather stool samples from subjects with inflammatory bowel disease (IBD) to be added to a test set of stool samples that will be utilized to help select molecular markers and determine the optimal sensitivity and specificity values for the Exact IBD-ACRN surveillance test for colorectal cancer (CRC).

Inclusion Criteria:

• Male or Female 18 - 84 years of age, inclusive, who have been diagnosed with IBD.
• Willing to provide a stool sample ≤120 but ≥7 days after a surveillance colonoscopy, which was negative for cancer/dysplasia.
• Written informed consent document signed and dated by the subject.

Exclusion Criteria:

• Any condition that in the opinion of the investigator should preclude participation in the study.
• A history of aerodigestive tract cancer.
• Prior colorectal resection, except ileocolic resection in Crohn's disease patients.
• IBD limited only to the rectum.
• Subject has participated in any clinical study within the previous 30 days wherein an investigational compound or device was, or may have been, introduced into the subject.

Patients are at risk of developing colorectal cancer at the time of their colonoscopy and the colonoscopy resulted in normal findings.