A Patient 45 y/o, has an enlargement of the right lobe of the thyroid gland , in which a round soft and elastic growth can be palpated; the growth is neither fused with the surrounding tissues nor...

A Patient 45 y/o, has an enlargement of the right lobe of the thyroid gland , in which a round soft and elastic growth can be palpated; the growth is neither fused with the surrounding tissues nor painful. Lymphatic nods are not palpated. What diagnosis can be suspected?