A case of pervasive developmental disorder complicated by social anxiety disorder responding well to fluvoxamine therapy.

We recently encountered a patient with pervasive developmental disorder not otherwise specified (PDDNOS), in whom complication by social anxiety disorder (SAD) was diagnosed at age 19, and who responded well to fluvoxamine therapy. The patient was a 19-year, 10-month-old male. He first visited our department at the age of 11 years and 3 months with the chief complaint of maladaptive behavior at school, when he was diagnosed as having PDDNOS. He was subsequently managed as an outpatient, with symptomatic alleviation in response to treatment. Recently, he visited our department again with the chief complaint of phobia of eye contact with other people. Based on the diagnosis of PDDNOS complicated by SAD, fluvoxamine therapy was initiated, which resulted in alleviation of the phobia against his own glance. Our experience with this case suggests that treatment with selective serotonin reuptake inhibitors can be effective in patients with PDDNOS complicated by SAD. Further study of patients with PDD associated with SAD, including evaluation of drug therapy, in additional cases is warranted.