This book aims to guide doctors about the treatment and follow up of the patients with thyroid carcinoma. It is a summary of guidelines and recent research with the experience of a radioactive iodine treatment clinic. The book also includes some scintigraphic interesting images of the patients of our clinic. The target of this book is specialists in the area of Endocrinology, Nuclear Medicine, Oncology and doctors who may be involved in the follow up of the patients with differentiated thyroid carcinoma from other disciplines.