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Osseous metaplasia of the thyroid cancer.

Papillary carcinoma is the most frequently occurring thyroid cancer among both children and adults which may occur at any age. Exposition to the ionizing radiation is the main risk factor. Papillary carcinoma may be indicated by the painless tumor, which is hormonally inactive. The long-term survival rate is dependent upon patient's age, infiltration of the surrounding tissues and remote metastases. The carcinoma sites may include fibrosis areas, psammoma bodies, squamous metaplasia features. The osseous metaplasia tumor is a rare occurrence. This study reports the case of the patient who underwent thyroidectomy, diagnosed as papillary thyroid carcinoma with osseous metaplasia and mature bone formation.