The book "Molecular Basis of Thyroid Cancer" offers a comprehensive analysis of the molecular foundations of thyroid cancer, one of the fastest-growing cancer types in the USA, particularly among women. It highlights advancements in treatment and the need to better understand the underlying factors of this disease. The authors discuss the complexity of cancer origins and the pathology of thyroid tumors, including lymphomatous forms. Additionally, it addresses molecular genetic changes associated with spontaneous and radiation-induced thyroid tumors, as well as diagnostic tests for determining tumor subtypes. The book also provides insights into therapeutic advancements, including the use of recombinant hTSH superagonists and drug combinations for the treatment of poorly differentiated and anaplastic thyroid cancer. Furthermore, it discusses the future of gene therapy in the treatment of these aggressive tumors, and the molecular genetics of medullary thyroid cancer is examined in detail.