The authors present the results of a retrospective study on Behçet's disease, concerning 19 patients observed in Medicine Service 2 (Santo António dos Capuchos Hospital) between 1982 and 1991. There were 15 male and 4 female patients, with a mean age of 33. The clinical manifestations were: oral--100%, ocular--100%, genital--89%, articular--79%, cutaneous--68%, general non-specific manifestations--52%, venous--26%, peripheral nervous system--21%, central nervous system--10% and persistent headaches--10%.