Mimickers of nervous system involvement among patients with Behçet's syndrome.

Objectives: We aimed to identify conditions mimicking nervous system involvement among patients with Behçet's syndrome (BS) and to determine clinical, laboratory and imaging findings that may help in the differential diagnosis. Methods: We screened the charts of 500 consecutive BS patients to identify those who were referred to neurology at any time during their follow-up. The final diagnoses, presenting signs and symptoms, laboratory and imaging results were retrieved from patient charts. Patients who did not have a follow-up visit during the last 3 months were invited to the clinic. Results: Among the 500 BS patients, 116 (23%) had been referred to neurology. Among these, 29 (5.8%) were diagnosed with typical central nervous system involvement of BS (NeuroBS). The type of NeuroBS was parenchymal involvement in 21 patients, cerebral venous sinus thrombosis in 7 patients, and both in 1 patient. 30 patients (6%) had other conditions related to the nervous system, 46 (9.2%) did not have a nervous system disorder, and their symptoms recovered spontaneously, and 11 (2.2%) were lost to follow-up without a definite diagnosis. Of the 30 BS patients who were diagnosed with another nervous system condition, 14 (46%) had primary headache syndromes, 6 (20%) had psychiatric disorders, 2 had entrapment neuropathy, and 1 each had epilepsy, glial tumor, multiple sclerosis, Meniere's disease, optic neuritis, neuroretinitis, steroid myopathy and polyneuropathy. Conclusion: Nervous system conditions other than NeuroBS are frequent among BS patients referred to neurology. Caution is required to avoid misdiagnosis of these patients as NeuroBS. [ABSTRACT FROM AUTHOR]