What is a not active nodule on my thyroid?

Maybe serious: Thyroid nodules comprise many types, but can generally be classified by way of a thyroid uptake scan as hot or cold. By definition a cold nodule or not active nodule is more bothersome as thyroid cancers are often not active, but can be active. Generally a not active or cold nodule is biopsied unless extremely tiny. A hot nodule might be biposied, but many factors have to be considered.

It depends: A, "not active" nodule of the thyroid, also referred to as a, "cold nodule" was classically one which did not trap various radioactive tags on nuclear thyroid scanning. Classically, a solitary cold nodule was felt to be at a 50% risk for harboring a malignancy. As a result, such nodules are often subjected to needle biopsy, frequently under ultrasound guidance, for further evaluation.