Pathology General 05cbe274 Tense and painful thyroiditis is A Dequern's thyroiditis B Riedel thyroiditis C Hashimoto thyroiditis D Subacute lymphocytic thyroiditis High-Yield Explanation Answer- A. Dequern's thyroiditisDequervain thyroidits (granulomatous thyoiditis) - Most common cause of thyroid pain.