A differentiated adenocarcinoma arising from the follicular cells of the thyroid gland. Radiation exposure is a risk factor and it is the most common malignant thyroid lesion, comprising 75% to 80% of all thyroid cancers in iodine sufficient countries. Diagnostic procedures include thyroid ultrasound and fine needle biopsy. Microscopically, the diagnosis is based on the distinct characteristics of the malignant cells, which include enlargement, oval shape, elongation, and overlapping of the nuclei. The nuclei also display clearing or have a ground glass appearance. The disease is MONDO_0005075 (thyroid gland papillary carcinoma). Also known as: papillary cancer of the thyroid, papillary cancer of the thyroid gland, papillary cancer of thyroid, papillary cancer of thyroid gland, papillary carcinoma of the thyroid, papillary carcinoma of the thyroid gland, papillary carcinoma of thyroid, papillary carcinoma of thyroid gland.