Thyroid Dyshormonogenesis 2a, also known as deficiency of iodide peroxidase, is related to congenital hypothyroidism and goiter. An important gene associated with Thyroid Dyshormonogenesis 2a is TPO (Thyroid Peroxidase), and among its related pathways/superpathways are Neuroscience and G alpha (s) signalling events. Affiliated tissues include thyroid and liver, and related phenotypes are hypothyroidism and goiter