Thyroid Nodule

**Definition:** A small circumscribed mass in the THYROID GLAND that can be of neoplastic growth or non-neoplastic abnormality. It lacks a well-defined capsule or glandular architecture. Thyroid nodules are often benign but can be malignant. The growth of nodules can lead to a multinodular goiter (GOITER, NODULAR).

**Tree numbers:** - C04.588.322.894.800 - C04.588.443.915.800 - C19.344.894.800 - C19.874.788.800