The Endocrine System
Which of the following histological type of carcinoma thyroid most commonly metastasizes to lymph nodes? (LQ)
• Most papillary carcinoma present as asymptomatic thyroid nodules, but the first manifestation may be a mass in cervical nodes.
• Follicular carcinoma has little propensity for lymphatics but high for vascular invasion and spreads to bones, lungs and CNS.
• In anaplastic Ca direct spread (extensive local invasion) is more common than vascular.