Chest CT Appearances

Anaplastic Thyroid Carcinoma (ATC) CT Findings

• Necrotic mass
• Large in size
• Poorly defined margins
• Involvement of both lobes
• Mass effect on trachea and/or larynx
• Invasion of adjacent structures

Other Information About Anaplastic Thyroid Carcinoma (ATC)

Etiology:

• Unknown

Epidemiology:

• Rare
• Typically presents after age 60
• More common in females

Presentation:

• Palpable mass that grows quickly
• Dysphagia
• Dyspnea
• Vocal changes
• Cough

Prognosis:

• The 5-year relative survival rates are:
  • Localized: 45%
  • Regional: 14%
  • Distant: 5%
  • All SEER stages combined: 10%