Pathology IgG4-related disease is a newly recognized entity. Which of the following thyroid abnormality is associated with this condition? A De quervain thyroiditis B Postpaum thyroiditis C Reidel thyroiditis D Hashimoto thyroiditis 💡 Explanation IgG4-related disease is a newly recognized entity. Which of the following thyroid abnormality is associated with this condition? ✓ Correct Answer: C. Reidel thyroiditis