“…Based on the best available evidence, current guidelines and review articles recommend the use of antimicrobial prophylaxis for the majority of cleancontaminated procedures. [6][7][8]497,520,521 However, antimicrobial prophylaxis did not lower infection risk in randomized controlled trials of patients undergoing adenoidectomy, tonsillectomy, 522,523 and septoplasty, 524 and systematic reviews have not recommended prophylaxis for these procedures. 7,525,526 The efficacy of antimicrobial prophylaxis is best established for head and neck cancer surgery.…”