Glottic Cancer pT4a TNM Finding v7

**Semantic type:** Finding

**Definition:** Glottic cancer with moderately advanced local disease. Tumor invades through the outer cortex of the thyroid cartilage and/or invades tissues beyond the larynx (e.g., trachea, soft tissues of neck including deep extrinsic muscle of the tongue, strap muscles, thyroid, or esophagus). (from AJCC 7th Ed.)