The papulopustular lesion/arthritis cluster of Behcet's syndrome also clusters in families

Objective. We have previously reported distinct symptom clusters among our patients with Behçet's syndrome (BS). The presence of such clusters suggests that more than one pathogenetic mechanism might be operative in BS. Increases in the frequency of certain clusters in familial BS cases, if present, would further support this notion. To test this hypothesis, we compared the frequency of symptom clusters between familial (Group F) and non-familial (Group NF) cases of BS.