“…Ultrasound examination of the thyroid gland is of value in distinguishing cystic from solid thyroid nodules (Fujimoto et al, 1967;Thijs, 1971;Rasmussen et al, 1971;Blum et ., 1972;Miskin et al, 1973;Jellins et al, 1975), in distinguishing haemorrhage from malignant neoplasm in a rapidly enlarging gland (Blum et al, 1972;Thijs & Wiener, 1976) and in identifying suppressed thyroid tissue associated with a hot nodule (Thijs, 1971). This technique provides a useful record of change in size of thyroid nodules, even during thyroid hormone suppressant therapy (Blum et al, 1972;Thijs &Wiener, 1976).…”