Thyroid ultrasound: Hashimoto's thyroiditis

(A) Longitudinal (sagittal) view: Normal texture of a healthy thyroid lobe. (B) Longitudinal (sagittal) view: Hashimoto's thyroiditis, Giraffe pattern. (C) Transverse view: Hashimoto's thyroiditis, moth-eaten pattern. Note the general hypoechogenicity (darkness) of the Hashimoto's-involved gland, compared with the smooth, homogenously medium gray texture of the normal thyroid.