The binding of FasL to Fas causes apoptosis in Fas-expressing cells.25 Epithelial apoptosis in patients with CC and LC has been found to be indistinguishable compared to controls,26,27 whereas UC patients exhibit increased apoptosis.25 No previous studies of Fas and FasL levels in MC patients have been conducted. Here, FASLG is linked to laryngotracheoesophageal cleft.