We reported twelve patients, 11 females and 1 male aged from 33 to 57 years, who had been having a strong attachment for the diagnosis of Behçet's disease but had a part of the vexed diagnostic problem because of lacking stringent clinical features of genuine Behçet's disease. The chief complaint of the majority of those patients was usually a severe pain somewhere, such as abdominal pain, arthralgia or headache. However, examinations hardly furnished any evidence of inflammatory or organic lesions which could substantiate their complaints, in addition, symptoms were never progressive and no one showed positive skin prick test throughout the clinical course.
There may be some other causes for them and the underlying disease condition, although there was a high incidence of HLA-B51 among them, being comparable to that in patients with typical complete type. One must be cautious in making diagnosis of Behçet's disease when a patient shows only muco-cutaneous lesions and complaints not confirmed with objective signs.