Exhibit 23.2
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated February 27, 2018, relating to the consolidated financial statements of Sierra Oncology, Inc. and subsidiaries (the “Company”) appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2017.
/s/ Deloitte & Touche LLP
Grand Rapids, MI
February 27, 2018