If a patient is diagnosed with thyroid cancer, then whether it is papillary or medullary carcinoma or undifferentiated carcinoma, eating fungus cannot cure the cancer itself as a disease, but patients are allowed to eat fungus, and eating fungus will not worsen the cancer or dominate the further spread of the cancer, so any dietary therapy that can cure malignant tumors should not be easily believed. The main treatment for thyroid cancer is still surgery. As far as the current medical development is concerned, most of the thyroid cancer patients can be cured after surgery, only a small number of patients with medullary carcinoma or undifferentiated carcinoma have a high chance of recurrence after surgery due to their higher malignancy, and their 5-year survival rate is relatively low, as for papillary carcinoma, most patients’ life expectancy is basically not affected after surgery. As for thyroid cancer, except for iodine intake, i.e. some iodized salt or seafood, to reduce its intake, there are no clear dietary requirements, you can eat fungus, you can eat some cruciferous ones, such as mushrooms, broccoli and some fresh fruits and vegetables can be used.