Is a learning curve needed for transanal minimally invasive surgery for rectal lesions?

The article “Establishing the learning curve of transanal minimally invasive surgery for local excision of rectal neoplasms,” which was published in Surgical Endoscopy on March 2018, investigated the learning curve for transanal minimally invasive surgery (TAMIS) in the treatment of rectal neoplasms, by using group-specific cumulative sum (CUSUM) analysis and moving average plots. The authors analyzed 254 TAMIS procedures, and their main proficiency outcome was the rate of margin positivity.