Case presentation:

• Male.
• 50 y.o.
• Thyroid carcinoma.
• Tumor of intermediate differentiation andhigh biological aggressiveness, accounting for 2% -6% of all thyroid cancers. 
• Total thyroidectomyin 1995becauseofsuspectedthyroid canceron FNAC.
• Histology: poorlydifferentiatedthyroidcancer(insulartype) withlymphnodemetastasisin the centralcompartment (pT3N1aMx).

Teaching points:

• Management of poorly differentiated thyroid cancer.