Iodide mumps: a case report of complicated radioactive iodine causing sialadenitis.

Radiation sialadenitis is an uncommon adverse reaction to radioactive iodide therapy. Sialadenitis due to radiation exposure has a dose-related damage that can follow an acute or chronic inflammatory nature. We present a case of a patient who developed radiation sialadenitis after radioactive iodide therapy for papillary thyroid cancer resulting in severe parotid swelling and swelling, which resulted in an emergency department visit and had complete resolution with conservative management.