A 45-year-old woman presented with a 2-year history of a swelling on the left side of her neck and 3 months of pain in the swelling. On examination, a 4x5cm irregular, firm, nodular swelling was found on the left side of her neck. Differential diagnoses included solitary nodular goiter, follicular adenoma/carcinoma, and chronic lymphocytic thyroiditis. Tests showed a nontoxic nodular goiter. She underwent a left lobectomy and isthumectomy, with tissue sent for histopathology.