Prevalence and treatment outcomes of second primary malignancies in Saudi patients with differentiated thyroid cancers

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt

From the Department of Otolaryngology - Head and Neck Surgery (Al-Qahtani), College of Medicine, King Saud University, the Department of Radiation Oncology (Al-Assiri, Tunio, Al-Hussain), Comprehensive Cancer Center, the Department of Endocrinology and Thyroid Oncology (Aljohani), King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia, the Department of Radiation Oncology (Bayoumi), National Cancer Institute, Cairo University, Cairo, and the Department of Clinical Oncology (Maklad), Sohag University, Sohag, Egypt