Anaplastic Thyroid Cancer is very rare cancer that starts in a gland in your neck. It is more dangerous because it moves quickly. Most people do not survive longer than 6 months due to the aggressive nature of this disease and lack of effective treatment options. People with anaplastic thyroid cancer might cough up blood; have issues swallowing, hoarseness, loud breathing, or a lump in their neck. Despite, its high fatality rate, because this disease makes up less than 1% of all thyroid cancers, there is very little research funding for it.