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OBJECTIVE: Evoked potentials are used in the functional assessment of sensory and motor pathways. Conflicting results have been reported in different studies about the value of evoked potentials in demyelinating diseases. Over 80% of patients with multiple sclerosis present with a relapsing–remitting form of the disease. In this study we aimed to examine the value of each evoked potential to demonstrate the demyelinating lesions in a homogenous group of patients with relapsing remitting multiple sclerosis. We also aimed to examine the correlation between clinical status and evoked potential abnormalities. METHODS: Twenty patients with relapsing remitting multiple sclerosis and ten healthy volunteers were included in the study to evaluate the value of evoked potentials in a homogenous group. Visual, somatosensory and motor evoked potentials were measured and EDSS scores of the patients were calculated. RESULTS: Of 20 patients, 15 patients(75%) had VEP abnormality, 14 patients (70%) had MEP abnormality and 12 patients (60%) had tibial SEP abnormality. All patients had at least one abnormal evoked potential measurement. The abnormality of evoked potentials also had a correlation with high EDSS scores. CONCLUSION: We concluded that evoked potentials, especially used in combination, are good markers to show the nervous damage in patients with multiple sclerosis.

Erdheim-Chester disease is a rare, non-Langerhans form of systemic histiocytosis of unknown etiology. The disease affects multiple organ systems, including musculoskeletal, cardiac, pulmonary, gastrointestinal, and central nervous systems, producing protean manifestations. Neurological manifestations are less frequent. We present a 44-year-old patient with Erdheim-Chester disease who had bilateral carotid artery occlusion and cavernous sinus infiltration.

Tuberculous meningitis is the most severe manifestation of extrapulmonary tuberculosis with a high mortality and morbidity rates. It is usually presented with headache, fever, consciousness disturbances and convulsions. Eigth cranial nerve involvement is rarely reported in patients with tuberculous meningitis. There are only a few cases who presented with unilateral sensorineural hearing loss in the literature and the relationship between sensorineural hearing loss and tuberculous meningitis remains unclear. Acute deafness due to bilateral sensorineural hearing loss is not reported in the literature. We presented a 64 year old man who presented with an acute onset bilateral sensorineural hearing loss associated with tuberculous meningitis.

Scientific BACKGROUND: Herpes zoster ophthalmicus represents aproximately 25% of all zoster infections. However extraocular gaze palsy in association with herpes zoster infection is extremely rare. OBJECTIVE: We presented here a patient who had herpes zoster ophthalmicus with sixth cranial nerve palsy. CASE: The sixty year old patient had suffered from left retroorbital pain, conjunctival congestion and rashes on the left forehead and the nose and developed ipsilateral sixth cranial nerve palsy. RESULT: Herpes zoster virus infection should be taken into consideration in patients with extraocular paralysis and early treatment may prevent such complications