Removal of a salivary gland does not produce a dry mouth, called xerostomia. However, radiation therapy to the mouth can cause the unpleasant symptoms associated with reduced salivary flow. Your doctor can prescribe medication or other conservative treatments that may reduce the dryness in these instances.
Harlequin Ichthyosis Causes. The harlequin ichthyosis is known to be genetic in nature. The ABC 12 gene, which directs the protein production that is necessary to have a normal skin growth, is being mutated which leads to this severe skin disorder. It is a gene that is responsible for the transportation of lipid.
Rare genetic mutation confirmed as a cause of Tourette Syndrome. Brain researchers say they have confirmed for the first time that a rare genetic mutation can cause some cases of Tourette syndrome, with the fault disrupting production of histamine in the brain. Tics are repetitive movements and vocal sounds, and they are unwanted and involuntary - they cannot be controlled.