Juvenile Autoimmune Thyroid Disease: definition Posted by: Cleo Libonati, RN, BSN in DICTIONARY 0 2,362 Views An autoimmune thyroid disease in children characterized by abnormal circulating thyroid hormone levels. Click for full description. autoantibodies Autoimmune Disorders Children Glossary. Juvenile Autoimmune Thyroid Disease Thyroid Gland Disorder 2013-04-11 Cleo Libonati, RN, BSN