OC.07.7: Accuracy of Transperineal Ultrasound (Tpus) and Magnetic Resonance Imaging (Mri) in the Assessment of Perianal Crohn's Disease (Cd)

Management of patients with complex perianal fistulas in Crohn's disease: Optimal patient flow in the Italian clinical reality

“…However, MRI, carrying an accuracy of 76%-100%, is currently considered the best method for the assessment of complex high fistulas [80]. The Van Assche Score is an MRI based scoring system, which includes also parameters of active inflammation [81]. Nevertheless, the score was found to be insensitive to change in a subgroup of patients, displaying reduced fistula track volume upon long-term follow-up [82].…”

A global consensus on the classification, diagnosis and multidisciplinary treatment of perianal fistulising Crohn's disease

“…As a complementary method, the accuracy of transperineal ultrasound to detect and classify fistulas was found to be comparable to EUS. However, its accuracy to diagnose deep abscesses is low (47.1%) due to restricted field of view 43. Transperineal ultrasound may offer an advantage in detecting anovulvar fistulae (88.9% vs 44.4% when compared with MRI) 43.…”

“…However, its accuracy to diagnose deep abscesses is low (47.1%) due to restricted field of view 43. Transperineal ultrasound may offer an advantage in detecting anovulvar fistulae (88.9% vs 44.4% when compared with MRI) 43. Both EUS and MRI are superior to clinical examination when assessing and monitoring perianal fistulas 27 44 – 46.…”