MS-1005

You have been requested to evaluate a patient in your general practice, who has come in after discovering a new lump in her neck. The patient is in her mid-40s, has no significant medical history, and does not take any regular medications.

Upon examination, you observe a small mass in the front of the neck that moves upwards when the patient swallows. There is no associated lymphadenopathy. You refer the patient for an ultrasound and biopsy, which reveals the presence of ‘Orphan Annie eyes with psammoma bodies.’

Based on this finding, what is the most probable diagnosis?