The subglottic space.
D006801:Humans; D007822:Laryngeal Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000628:therapy; D007825:Laryngectomy; D007828:Laryngoscopy; D007830:Larynx / Q000033:anatomy & histology* / Q000473:pathology; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis / Q000175:diagnosis; D014827:Vocal Cords / Q000473:pathology