Pearls & oy-sters: treatment of central sleep apnea with topiramate.

Pearls and oy-sters: reversible Ondine's curse in a case of lateral medullary infarction.

Ondine's curse is an eponym that refers to central alveolar apnea/hypopnea observed among patients with acquired or congenital brainstem disorders. This condition results in loss of automatic and/or voluntary respiration with characteristic polysomnographic finding of impaired ventilator responses to hypercapnia and sleep apnea, which are more pronounced during non-REM sleep, less in REM sleep,...

Pearls & oy-sters: cerebral venous air embolism after central catheter removal: too much air can kill.

Pearls & Oy-sters: cough headache secondary to Chiari malformation type I.

Pearls & oy-sters: oval pupil: two observations.

The presence of an oval pupil usually localizes the neurologic problem to the midbrain.

Pearls & Oy-sters: a rare case of neurotrichinosis with MRI.

The neurologic manifestations of trichinosis are diverse, and range from encephalopathy to cerebral, cerebellar, and spinal cord abnormalities.