Understanding Goiter and Its Causes
Goiter refers to the enlargement of the thyroid gland, which can be attributed to abnormal hormone production or the formation of nodules on the gland. This condition can have various impacts, including affecting a child’s ability to breathe and swallow. Studies indicate that around 80% of individuals diagnosed with Pendred syndrome also develop a goiter, despite having normal hormone production. In these cases, the thyroid gland is likely compensating for the deficiency of iodide ions caused by the problematic SLC26A4 gene.
Cochlear Hyperplasia: A Congenital Ear Bone Deformity
Cochlear hyperplasia, also known as Mondini dysplasia, is a congenital ear bone deformity commonly found in individuals with Pendred syndrome. The condition was first identified by the renowned 18th-century Italian physician, Carlo Mondini, who made the discovery while examining the inner ear of a deaf child. In cochlear hyperplasia, the cochlea – the spiral bone responsible for sound processing – is not fully developed. Instead of the usual 2.5 turns, the cochlea of affected individuals only has 1.5 turns in its coiled design.