Sudden nosebleed after more than a year of bilateral resection of malignant papillary thyroid cancer is not very related to papillary thyroid cancer. Sudden nosebleed may be related to dryness of nasal mucosa, abnormal coagulation mechanism, nasal metastasis and so on.
1. Dryness of nasal mucosa: Because nasal mucosa is thin and capillaries in nasal cavity are underneath the mucosa, if the air is dry, the ventilation of nasal cavity will be increased, so the nasal mucosa is easy to be excessively dry, resulting in ulceration of mucosa and bleeding.
2. Abnormal coagulation mechanism: abnormal coagulation mechanism will lead to thrombocytopenia, abnormal coagulation function, nasal blood vessel deformity, and so on, which are likely to lead to nosebleed. Common diseases caused by abnormal coagulation mechanism include leukemia, hemophilia, etc., which are diagnosed by checking blood routine and coagulation mechanism.
3. Nasal metastasis: malignant papillary thyroid cancer does not lead to nosebleed, so if it bleeds, there is a possibility of nasal metastasis. If the cancer cells metastasize in the nasal cavity, it is very likely that the capillaries in the nasal cavity will be constantly stimulated, which will lead to their rupture and bleeding.
If malignant papillary carcinoma of thyroid gland has been removed bilaterally for more than one year and suddenly bleeds from the nose, it is recommended that the patient go to the regular hospital for diagnosis and treatment immediately to avoid metastasis and spread of cancer cells.