Abstract: In a study on 391 cases of BD presented to the EULAR Congress in 1987 we demonstrated that the following symptoms were seen more frequently in patients with positive pathergy phenomenon: oral aphthosis as the initial manifestation of the disease, genital ulcerations, pseudofolliculitis, and arthralgia. The following symptoms, on the contrary were seen less frequently: oral aphthosis, ankylosing spondylitis. It was interesting to look after those findings, 6 years later, in ...