Thyroid Hemiagenesis: A Sonographic Diagnosis

A 25-year-old African-American woman presented to a chiropractic teaching clinic for a sonographic carotid screening examination with a GE LOGIQ e ultrasound scanner (GE Healthcare, Milwaukee, WI, USA) using a 8–13 MHz linear array transducer. During the otherwise normal carotid examination, an asymmetrical appearance of the thyroid gland was noted.Thyroid abnormalities are commonly identified during sonographic carotid duplex screening examinations. The majority of the abnormalities are considered incidental. Herein, we present a case of thyroid hemiagenesis, a rare diagnosis, discovered during a sonographic examination of the extracranial vasculature. We also discuss the thyroid pathologies associated with thyroid hemiagenesis.