Congenital iodine deficiency syndrome degree of iodine deficiency was milder and manifested primarily as thyroid enlargement rather than severe mental and physical impairment. In Switzerland, for example, where soil does not contain a large amount of iodine, cases of congenital iodine deficiency syndrome were very abundant and even considered genetically caused. As the variety of food sources dramatically increased in Europe and North America and the populations became less completely dependent on locally grown food, the prevalence of endemic goitre diminished. The early 20th century saw the discovery of the relationships of neurological impairment with hypothyroidism due to iodine deficiency. Both have been largely
ZC4H2 deficiency neurological manifestations. These can include: To date, there is no cure or effective treatment for this condition. Current approach is limited to supportive therapies and interventions. ZC4H2 deficiency ZC4H2 (Zinc finger C4H2-type) is a protein-coding gene located on the X-chromosome. This gene encodes a protein which is a member of the so-called zinc finger domain-containing protein family. There is currently very limited understanding about the ZC4H2 gene and its protein function. Any pathogenic variant of ZC4H2 which is associated with a clinical phenotype is referred to as "ZC4H2 Deficiency". The limited research published to date indicates that ZC4H2 is expressed