What's your question, exactly? What's the Dean's Letter? Every med student has their dean write them a composite "Dean's Letter," which is a summary of all your med school accomplishments - grades, evaluations, board scores, extracurriculars, etc. This letter is released to ERAS on the same date every year - I forget when, exactly...many residency programs start inviting applicants for interviews after they receive this letter.
Are you in med school now?