<prompt> Regarding anaplastic carcinoma which statement is falseCommon in elderlyAssociated with P53 mutationSurrounding neck tissue is usually infiltratedRadiotherapy cures  <response>: More commonly seen in elderly women. Local infiltration is an early feature of these tumours with spread by lymphatics and by the bloodstream. They are extremely lethal tumours and survival is calculated in months. p53 mutations are found in 15 of tumors, Source : Sabiston 20th edition Pg: 910 