Comparing diagnostic accuracy of transperineal ultrasound using microconvex probe versus conventional linear probe to predict rectal histoendoscopic activity in ulcerative colitis: a paired prospective, head-to-head comparative study

Key Points

• To evaluate and compare the diagnostic accuracy of microconvex and linear probes in assessing rectal histoendoscopic activity in ulcerative colitis.
• Conducted a paired prospective study.
• Employed transperineal ultrasound with both microconvex and linear probes.
• Assessed rectal histoendoscopic activity as the primary outcome.
• Microconvex TPUS showed favorable diagnostic trends for posterior wall thickness.
• No single probe outperformed the other in all assessments, indicating complementary roles.