Objective-Familial aggregation of Behçet's disease has been reported previously. The current study aimed at investigating the sibling recurrence risk ratio ( s) for Behçet's disease, which is of value in the estimation of the magnitude of genetic factors in the pathogenesis of Behçet's disease. Methods-170consecutive unrelated index cases (98 male, 72 female) were interviewed with a detailed questionnaire to ascertain their family trees and the manifestations of Behçet's disease in their relatives. Subsequently, the immediately older sibling, or if an older sibling was not available, the immediately younger sibling, was selected as the second sibling for the evaluation. These siblings were contacted by telephone, and all subjects with recurrent oral ulcers were invited for examination. Results-31 of the 170 index cases had 51 relatives fulfilling the International Study Group criteria. Among 166 second siblings, seven had Behçet's disease (six male, one female) and 22 siblings (eight male, 14 female) with recurrent oral ulcers were identified. Sibling recurrence rate-defined as the ratio of the risk of being aVected among the siblings of patients and the risk of being aVected in the general population-was found to be 4.2%, which gives a s value for Behçet's disease of between 11.4 and 52.5 in Turkey. Conclusions-A high s value supports a strong genetic background for Behçet's disease which will be helpful in designing genetic linkage studies.

It has been generally accepted that the clinical onset of familial Mediterranean fever (FMF) begins before 20 years of age in most patients. In this study, we aimed to investigate the demographic and clinical characteristics of our FMF patients with an age of onset > or =20. Records of 401 patients (female/male: 204/197) that followed up between 1990 and 1999 were reviewed according to a pre-defined protocol. All patients fulfilled the diagnostic criteria of Livneh et al. The demographic and clinical features of adult-onset FMF patients were compared to those of patients with a disease onset before 20 years of age. There were 57 patients (14%) who experienced symptoms of FMF at > or =20 years of age; 34 of them (8.5%) reported their first attack between 20 and 29 years of age; 18 of them (4.5%) between 30 and 39 years of age and five patients (1.25%) had their first attack after 40 years of age. Arthritis (42 vs. 65%, p = 0.001) and erysipelas-like erythema (7 vs. 17%, p = 0.047) were significantly less frequent in patients with adult-onset FMF compared to patients with disease onset before 20 years of age. Arthritis and erysipelas-like erythema were less frequent in adult-onset patients compared to those with an earlier disease onset. Adult-onset FMF may be a form of disease with distinct clinical, demographic and molecular characteristics. Prospective clinical studies and investigation of genotypic features are needed to identify the characteristics of this phenotypic variant.

The objective was to investigate the frequency and characteristics of tuberculosis (TB) in patients with systemic lupus erythematosus (SLE). We reviewed the charts of 556 patients with SLE who were followed up between 1978 and 2001 in our lupus clinic. Patients who developed TB after the diagnosis of SLE were identified (SLE/TB+). Ninety-six consecutive patients with SLE who did not develop TB during the follow-up were evaluated as a control group (SLE/TB-). Clinical, laboratory and management characteristics of these two groups of patients were recorded according to a predefined protocol, and compared. Of the 556 patients evaluated, 20 patients (3.6%) with TB were identified. Nine of the 20 patients (45%) had extrapulmonary TB (vertebral involvement in three patients, meningeal in two, and joint and soft tissue in four). Arthritis and renal involvement were significantly high in the SLE/TB+ group (P = 0.045, P = 0.009, respectively). The mean daily dose of prednisolone before the diagnosis of TB and the cumulative dose of prednisolone were significantly higher in the SLE/TB+ group compared to the SLE/TB- group (27 +/- 22 g versus 16 +/- 16 g, 24 +/- 45 mg versus 11 +/- 8.5 mg, respectively). In conclusion, we found an increased frequency of TB infection and a high prevalence of extrapulmonary TB in a large cohort of SLE patients. The mean daily dose of prednisolone before the diagnosis of TB and the cumulative dose of prednisolone, which possibly related to disease severity, were important determinants for the increased risk of TB in these patients with SLE.

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