P.05.11: Role of Transperineal Ultrasonography (TPUS) in follow up of IBD Patients with Perianal Disease. (15th March 2017) - Terracciano, F.; Amoruso, A.; Perri, F.; Scimeca, D.; Bossa, F.; Biscaglia, G.; Scalisi, G.; Valvano, R.; Andriulli, A.