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Thyroid blood flow evaluation by color-flow Doppler sonography distinguishes Graves' disease from Hashimoto's thyroiditis. 1995

P Vitti, and T Rago, and S Mazzeo, and S Brogioni, and M Lampis, and A De Liperi, and C Bartolozzi, and A Pinchera, and E Martino
Istituto di Endocrinologia, University of Pisa, Italy.

Thyroid hypoechogenicity at ultrasound is a characteristic of autoimmune thyroid diseases, with an overlap of this echographic pattern in patients affected by Graves' disease or Hashimoto's thyroiditis. Aim of the present paper was to study the thyroid blood flow (TBF) by color-flow doppler (CFD) and peak systolic velocity (PSV) at the inferior thyroid artery in 37 Graves' and 45 goitrous Hashimoto's thyroiditis patients. CFD pattern was defined as normal (or type 0): TBF limited to peripheral thyroid arteries (PSV = 17.7 +/- 3 cm/sec, mean +/- SD); type I: TBF mildly increased; type II: TBF clearly increased; type III: TBF markedly increased. The CFD was in direct relationship to the PSV. Out of 18 patients with Graves' disease and untreated active hyperthyroidism CFD pattern was type III in 17 and type II in 1. The PSV was 42.1 +/- 15 cm/sec. In 17 patients euthyroid under methimazole, the CFD pattern was type 0 in 3 (17%) type I in 5 (30%), type II in 5 (30%), type III in 4 (23%). In this group of Graves' patients the PSV was 36 +/- 14 cm/sec. In two patients, hypothyroid after radioiodine treatment, the CFD pattern was type 0 in 1 and type I in 1. In the group of Hashimoto's patients TBF was in no relationship with thyroid status or treatment and was type 0 in 22 (49%), type I in 20 (44%), type II in 3 (7%), while none had type III CFD pattern. Thyroid hypoechogenicity at ultrasound was present in 32/37 (86%) Graves' and 41/45 (91%) Hashimoto's patients. All the four patients with Hashimoto's thyroiditis and normal thyroid ultrasound pattern had also a normal CFD pattern, while 4/5 patients with Graves' disease and normal echographic pattern had an increased TBF. In conclusion, a diffusely increased thyroid blood flow is pathognomonic of untreated Graves' disease and an abnormal CFD pattern identifies the majority of Graves' patients with a normal thyroid ultrasound pattern. Thus, CFD sonography may be useful in distinguishing patients with Graves' disease and Hashimoto's thyroiditis having a similar thyroid echographic pattern at ultrasound.

UI MeSH Term Description Entries
D008297 Male Males
D012039 Regional Blood Flow The flow of BLOOD through or around an organ or region of the body. Blood Flow, Regional,Blood Flows, Regional,Flow, Regional Blood,Flows, Regional Blood,Regional Blood Flows
D003937 Diagnosis, Differential Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures. Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D005260 Female Females
D006111 Graves Disease A common form of hyperthyroidism with a diffuse hyperplastic GOITER. It is an autoimmune disorder that produces antibodies against the THYROID STIMULATING HORMONE RECEPTOR. These autoantibodies activate the TSH receptor, thereby stimulating the THYROID GLAND and hypersecretion of THYROID HORMONES. These autoantibodies can also affect the eyes (GRAVES OPHTHALMOPATHY) and the skin (Graves dermopathy). Basedow's Disease,Exophthalmic Goiter,Goiter, Exophthalmic,Graves' Disease,Basedow Disease,Hyperthyroidism, Autoimmune,Basedows Disease,Disease, Basedow,Disease, Basedow's,Disease, Graves,Disease, Graves',Exophthalmic Goiters,Goiters, Exophthalmic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013961 Thyroid Gland A highly vascularized endocrine gland consisting of two lobes joined by a thin band of tissue with one lobe on each side of the TRACHEA. It secretes THYROID HORMONES from the follicular cells and CALCITONIN from the parafollicular cells thereby regulating METABOLISM and CALCIUM level in blood, respectively. Thyroid,Gland, Thyroid,Glands, Thyroid,Thyroid Glands,Thyroids
D013967 Thyroiditis, Autoimmune Inflammatory disease of the THYROID GLAND due to autoimmune responses leading to lymphocytic infiltration of the gland. It is characterized by the presence of circulating thyroid antigen-specific T-CELLS and thyroid AUTOANTIBODIES. The clinical signs can range from HYPOTHYROIDISM to THYROTOXICOSIS depending on the type of autoimmune thyroiditis. Autoimmune Thyroiditis,Thyroiditis, Lymphocytic,Thyroiditis, Lymphomatous,Autoimmune Thyroiditides,Lymphocytic Thyroiditides,Lymphocytic Thyroiditis,Lymphomatous Thyroiditides,Lymphomatous Thyroiditis,Thyroiditides, Autoimmune,Thyroiditides, Lymphocytic,Thyroiditides, Lymphomatous
D018615 Ultrasonography, Doppler, Color Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region. Doppler Ultrasonography, Color,Ultrasonography, Color Doppler,Color Doppler Ultrasonography,Color Ultrasonography, Doppler,Doppler Color Ultrasonography,Ultrasonography, Doppler Color

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