Congenital hypofunction of the thyroid gland with long trunk dwarfism, protruding abdomen, large head, characteristic facies, mental deficiency, and other abnormalities. Cretinism associated with goiter is called goitrous cretinism. Forms related to dysgenesis of the thyroid gland are referred to as athyreotic cretinism agoitrous cretinism or hypothyroidism athyreotic hypothyroidism thyroid dysgenesis Muscular hypertrophy in hypothyroid children is known as Kocher-Debre-Semelaigne syndrome.