[Dermatological findings in the annual examination of the patients with Yusho in 1991-1992].

We reported the skin symptoms and PCB concentrations of the patients with Yusho in the 1991 and 1992 annual examinations. We also reported the alteration of the skin symptoms in 20 patients followed up for 16 years (1977-1992). Most of the patients examined in 1991-1992 showed low score of skin symptoms which are the same as those in recent 7 years. Approximately 30% of the patients still have comedones and/or acneiform eruptions in 1991-1992. Pattern and concentrations of PCB in the patients have not remarkably changed in recent 5 years.