Multi-nodular goitre

44 year old female complained of neck swelling for many years. She is otherwise asymptomatic. Ultrasound showed both lobes are enlarged, heterogenous with solid and cystic lesions. There is a 2.7cm complex cyst at the lower pole of the right lobe. There is a semi-solid 2cm mass at the lower pol of left lobe. There is a 1.3cm solid mass at the isthmus. Findings are consistent with multi-nodular goitre.