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Advanced Technical IVT

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

Also known as

cartilage invasion extralaryngeal spread

Don't confuse with

cricoid cartilage invasion thyroid gland invasion

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