label: Subglottic Cancer pT4a TNM Finding v7
label_lc: subglottic cancer pt4a tnm finding v7
description: "Subglottic cancer with moderately advanced local disease.  Tumor invades cricoid or thyroid cartilage and/or invades tissues behind the larynx (e.g. trachea, soft tissues of neck including deep extrinsic muscles of the tongue, strap muscles, thyroid, or esophagus). (from AJCC 7th Ed.)"