P102 The hidden face of Behcet’s syndrome; central nervous system involvement, a single-center experience

Abstract Background/Aims Neurologic involvement in Behcet’s syndrome (BS) remains an unelucidated area that needs further attention. In this study, we aimed to analyze the patterns of neurologic involvement and evaluate their association with other clinical features. Methods 800 patients with BS diagnosis according to The International Criteria for Behcet’s Disease (ICBD) followed in our center were retrospectively screened and 55 patients with central nervous system involvement and 20 patients with non-vascular BS were enrolled in this study. These patients were classified as sinus vein thrombosis (SVT), parenchymal involvement, and mixed (SVT and parenchymal). These groups were compared in terms of demographic and clinical features. Results Thirty-two (58,2%) of the patients were male. Distribution of neurologic involvement were as follows; 22 (40%) with isolated sinus vein thrombosis (SVT), 25 (%45) with isolated parenchymal, and 8 (%15) with mixed pattern. Central nervous involvement was the diagnostic feature of BS in 25 patients. Headache was the most common symptom followed by neurologic deficits and dizziness (44%, 25%, 16%). The most common sites of involvement were subcortical and periventricular areas followed by brainstem (63% vs 37%). In SVT group, positive family history of BS (p < 0.001) and previous deep vein thrombosis (DVT) (p:0.004) were found higher. Smoking history, erythema nodosum, cardiac and pulmonary involvement were significantly higher in parenchymal group (p < 0.001) (Table 1). Conclusion Although brainstem involvement is considered as more characteristic in BS, white matter and periventricular involvement were also found as common in our study. Notably, these subgroup analyses may suggest the speculation that BS shows clusters even within the neuro-vascular involvement. Disclosure R. Yıldırım: Other; Reşit Yıldırım is a member of Rheumatology journal as an associate editor. M. Dinler: None. A.E. Arslan: None. N.S.Y. Bilge: None. T. Kaşifoğlu: None.