1 The Department of Pediatrics, McGill University and The Montreal Children's Hospital, Montreal
This report describes results of endocrine and immunological investigations performed on an 8-year-old, hypothyroid, mongoloid girl with precocious puberty. Based on these studies, animal experiments, and a review of the pertinent literature, it is suggested that the observed hypothyroidism and Down's syndrome may both be related to thyroid autoimmunity, and the sexual precocity may be due to the response of the ovary to excessive TSH stimulation.
Submitted on January 5, 1967