Thyroid tumors belong to the category of diseases, which can manifest as nodules, while thyroid nodules are just a symptom. Diseases that cause thyroid nodules can be inflammation, hyperplasia, adenomas, cysts, and cancer. In other words, thyroid nodules include thyroid tumors. Thyroid adenoma is a disease, which is a benign tumor that occurs on the thyroid tissue and can appear as a nodule. Thyroid nodules, on the other hand, are just a symptom and can be benign in nature such as thyroid hyperplasia, inflammatory nodules, adenomas, cysts, hemangiomas, etc. or malignant such as thyroid cancer. Thyroid adenoma is the most common benign tumor of the thyroid gland, and its occurrence is related to factors such as heredity, radiation damage, and long-term stimulation of thyrotropin, etc. Early stage of thyroid adenoma has no obvious symptoms, and it is often found accidentally during physical examination. It is often found accidentally during physical examination. The main treatment is surgical resection under the guidance of physicians. It is recommended to consult a doctor as soon as possible if you have a thyroid tumor or nodule, so as to avoid delaying your condition.