José Francisco Salles Chagas did his PhD in the year Jan 1998–Aug 2001 at Universidade Federal de São Paulo, Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço, head and neck neoplasms, Brazil. Present he is head and neck service chief. professor of surgery and anatomy PUC Campinas,  Anatomy and Surgery, head and neck neoplasms, Brazil.
 

• Thyroid Cancer
• Thyroid Diseases
• Head and Neck Surgery
• Surgical Oncology
• Parathyroidectomy
• Thyroidectomy
• Parathyroid Diseases
• Primary Hyperparathyroidism
• Thyroid surgery
• Thyroid Neoplasms
• Parathyroid Glands
• Hyperparathyroidism
• Neck Dissection
• Surgical Education
• Esophageal Diseases