thyroid cartilage invasion
Tumor penetration through thyroid cartilage, upstaging laryngeal cancer to T4a classification.
Full Definition
Thyroid cartilage invasion refers to tumor extension through the thyroid cartilage framework of the larynx, representing a critical staging criterion in laryngeal cancer. This finding automatically classifies the tumor as T4a according to TNM staging, regardless of other factors. Detection typically requires high-resolution CT or MRI imaging, though definitive confirmation may require surgical exploration. The presence of thyroid cartilage invasion significantly impacts treatment planning and prognosis, often necessitating total laryngectomy rather than organ-preservation approaches.
Usage
Usage note: Automatically classifies tumor as T4a regardless of size.
In Context
- "CT imaging demonstrated thyroid cartilage invasion, upstaging the tumor to T4a." — Radiology report
- "Histopathologic examination confirmed thyroid cartilage invasion by squamous cell carcinoma." — Pathology report