Keywords : CDH, chronic lymphocytic thyroiditis, congenital diaphragmatic hernia, congenital hypothyroidism, congenital pyriform sinus fistula, ectopic thyroid, fetal chest, fetal heart, fetal oropharynx, fetal thymus, fibromatosis colli, Hashimoto’s thyroiditis, hyoid bone, lymphatic malformation, pediatric thymus, pediatric thyroid gland, pediatric ultrasound, Society of Radiologists in Ultrasound, SRU, sternocleidomastoid muscle, suppurative thyroiditis, thyroglossal duct cyst, thyroid cancer, thyroid goiter, thyroid isthmus, thyroid nodules, thyroid teratoma