Thyroid isthmus agenesis associated with thyroid papillary carcinoma. [corrected]

A wide range of morphological varieties and developmental anomalies of the thyroid gland have been reported in literature such as hypoplasia, ectopy, hemiagenesis, and agenesis. Out of these, the incidence of agenesis of the thyroid isthmus is rare, and very few cases have been reported. In the present case report, a female patient was found with agenesis of thyroid isthmus with thyroid papillary carcinoma in the right lobe. In this article, we report a case of thyroid isthmus agenesis and reviewed the associated literature.