During residency he deepened his knowledge in Traumatology and General Orthopedic during first three years, while in the last two years he attended the most important Orthopedic Oncology Department in the world (AOUC Careggi, Florence, headed by Professor Capanna; MSKCC in New York, NY, headed by Professor Healey; Children Hospital in Boston, MA, headed by Professor Gebhartd). After residency Dr Caff worked for 1 year in a trauma center in Sciacca, Sicily and now he is joining a clinical and research fellowship at Department of Orthopedic Oncology in Florence. He published more than 50 papers in national and international journals.