The 2021 MSTS Annual Meeting was a hybrid meeting with in-person and virtual attendance options. The MSTS 2021 Annual Meeting was held October 6-8, 2021, at the Four Seasons Baltimore Hotel, in Baltimore, Maryland. The Welcome Reception was on Wednesday evening, October 6th and the scientific session with paper presentations and panel discussions was held on Thursday, October 7th and Friday, October 8th. The MSTS social event was scheduled on Thursday evening, October 7th. The Annual Meeting adjourned at 1:00 PM on Friday, October 8th.