adis syndrome

Info:

Adie syndrome, sometimes known as Holmes-Adie Syndrome or Adie's Tonic Pupil, is a neurological disorder characterized by a tonically dilated pupil. It is caused by damage to the postganglionic fibers of the parasympathetic innervation of the eye, usually by a viral or bacterial infection which causes inflammation, and affects the pupil of the eye and the autonomic nervous system.

Signs and symptoms

Adie syndrome presents with three hallmark symptoms, namely at least one abnormally dilated pupil (mydriasis) which does not constrict in response to light, loss of deep tendon reflexes and diaphoresis (excessive sweating).

Causes

Pupillary symptoms of Holmes-Adie Syndrome are thought to be the result of a viral or bacterial infection that causes inflammation and damage to neurons in the ciliary ganglion, an area of the brain that provides parasympathetic control of eye constriction. Additionally, patients with Holmes-Aide Syndrome can also experience problems with autonomic control of the body. This second set of symptoms is caused by damage to the dorsal root ganglia of the spinal cord.

Diagnosis

Clinical exam may reveal sectoral paresis of the iris sphincter or vermiform iris movements. The tonic pupil may become smaller (miotic) over time which is referred to as "little old Adie's".[Testing with low dose (1/8%) pilocarpine may constrict the tonic pupil due to cholinergic denervation supersensitivity.A normal pupil will not constrict with the dilute dose of pilocarpine. CT scans and MRI scans may be useful in the diagnostic testing of focal hypoactive reflexes.

Treatment

The usual treatment of a standardised Adie syndrome is to prescribe reading glasses to correct for impairment of the eye(s).Pilocarpine drops may be administered as a treatment as well as a diagnostic measure. Thoracic sympathectomy is the definitive treatment of diaphoresis, if the condition is not treatable by drug therapy