<prompt> Carcinoma thyroid with blood-borne metastasis is-FollicularPapillaryMixedMedullary  <response>: As already explained abovePapillary spreads mainly by lymphaticsFollicular spreads mainly by hematogenousAnaplastic spreads mainly by direct lymphatic and blood-borne spread is also seenMedullary spreads mainly by lymphaticsAlso RememberThe most common sites of blood-borne metastasis are lung, bones and brain. Lung involvement is more frequent in papillary carcinoma, while bone involvement is more common in follicular thyroid Ca.Endocrine surgery of head neck by Phillip K. Pellitteri Thomas V. McCaffrey 