A cold nodule is a thyroid nodule that does not produce thyroid hormone.[1] On a radioactive iodine uptake test a cold nodule takes up less radioactive material than the surrounding thyroid tissue.[1] A cold nodule may be malignant or benign. [1] On scintigraphy cold nodules do not show but are easily shown on ultrasound.[2] Figure 1 illustrates the basic anatomy of the thyroid gland.[3] The case shown in Figure 4 shows a cold nodule quite emphasized representation of the thyroid. The investigation was carried out due to a goiter rating of 3.