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Table 4 McCaffrey classification [21]

From: Adolescent and adult laryngotracheal stenosis: a review

Stage I Subglottic or tracheal lesions < 1 cm long
Stage II Subglottic lesions > 1 cm long
Stage III Subglottic/tracheal lesions not involving the glottis
Stage IV Glottic lesions
  1. Source: McCaffrey, 1992 [21]