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Background and Objective: Multiple sclerosis is one of demyelinating disorder of CNS that is an uncommon cause of the sensorineural hearing loss. This study was done to determine the hearing loss in multiple sclerosis patients.

Materials and Methods: This case-control study was performed on 60 (44 women, 16 men) multiple sclerosis patients and 38 (27 women, 11 men) normal subjects by pure tone audiometery, otoacustic emissions and auditory brainstem responses in Gilan provine, Iran during 2010-11. Data was analyzed by using SPSS-17, Chi-Square and Fischer tests.

Results: 12.5% of case and 3.9% of the control ears had abnormal pure tone audiometery (P<0.05). The frequencies of abnormal HF-pure tone audiometery and two modalities of otoacustic emission did not show any significant differences in two groups. Abnormal autidory brainstem response of ears were observed in 20% and 9.2% of cases and controls, respectively (P<0.05). 20% of case and 9.2% of the control ears had abnormal auditory brainstem response (P<0.05). The absolute latencies of waves I, II and V had not significant differences between two groups. Inter peak latencies of I-III and III-V waves were observed in 10% and 11.7% in cases ears and 1.3% and zero percent in controls, respecticely. 6.7% of cases and 2.6% of control ears had retrocochlear abnormality.

Conclusion: Hearing loss detected by pure tone audiometery and auditory brainstem response is more common in multiple sclerosis compared to normal population.

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Background and Objective: Meralgia paresthetica (MP) is due to lateral femoral cutaneous nerve (LFCN) involvement if it is left either unattended miss treated it can be followed by significant disabilities. This study was done to compare the neurolysis and nerve resection in treatment refractory of Meralgia paresthetica. Materials and Methods: This descriptive - comparative study was carried out on 14 patients (7 males and 7 females) afflicted with Meralgia paresthetica and resisted to theraputical regiment in Poorsina hospital in Rasht, North of Iran during 2001-08. The patients were selected non-randomly and neurolysis were gone under either neurolysis or nerve resection surgery with 18-month follow-up. Results: All 5 patients with neurolysis operation were found to have the recurrent symptoms. Non of the patient operated with nerve resection demostrated the clinical manifestation of the recurment sympotms, following 18 month follow-up. The success rate of neurolysis and nerve resection were determined to be 3% and 98.8% respectively. Six women and three men are LFCN-resected a woman and four men treated with neurolysis. The mean age and the disease onset length were 64.6%±9.8 year and 18±11 months, respectively. Conclusion: Nerve resection method is suggested in patients with Meralgia paresthetica resisted to theraputical treatment.