Announcement: Welcome to the new SEER Inquiry System (SINQ). On September 14, 2021, SEER released the newly redesigned SINQ to make finding answers to cancer registrars' questions easier than ever. If you need help navigating the new system, please see the System Guide.

The SEER Inquiry System (SINQ) is a searchable collection of questions that cancer registrars have had while coding cancer cases. These are questions submitted by designated registrars in SEER registries. The questions are answered by expert staff and go through a rigorous review process by NCI SEER staff and designated SEER registry staff before being added to SINQ.

With SINQ, you can...
  • Submit Questions
  • Find Answers
  • Create Reports

Click Search to look for specific questions in SINQ or to select questions for a Report.

If you cannot find an answer to your question, refer to the Ask a SEER Registrar page.

Account holders login here.

Additional Information

How Can I Provide Feedback?

We are interested in receiving feedback from users. Please send comments to SEER Website Support.