You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A patient with multinodular goiter developed pain and difficulty in breathing which of the following types of thyroid carcinoma is most likely to cause this complication - and explain in detail?
Ans. is 'd' i.e., Anaplastic carcinoma Anaplastic Carcinoma* This tumor is one of the most aggressive thyroid malignancies, with few patients surviving six months beyond diagnosis.* All forms of treatment have been disappointing. If mass is resectable then thyroidectomy may lead to small improvement in survial.* It is locally aggressive and infiltrates surrounding tissue and can lead to airway obstruction and dyspnoea* Combined radiation and chemotherapy as adjuvant in resectable cases has been associated with prolonged survival. These are now also being used in neoadjuvant setting.* Tracheostomy may be needed to alleviate airway obstruction.