Abstract
An 85-year-old man was treated for psoriasis vulgaris by application of steroid ointment and administration of etretinate for 10 years. He visited our office three times due to erythroderma. On the first visit, we considered a focal infection based on an increase in white blood cells, neutrophils, and C-reactive protein. His skin condition improved after treatment with antibiotics and application of steroid and vitamin D ointments. On the second visit, he had to be admitted. Due to infection in the periodontal area, his teeth were pulled out, and he was treated for periodontal disease. He was also treated with application of steroid and vitamin D ointments. Subsequently, his general and skin conditions improved. On the third visit,he presented with periodontal disease and a painless inflammation of the gallbladder. After treatment of the periodontal disease with antibiotics and application of steroid and vitamin D ointments, the skin condition and the painless inflammation of the gallbladder improved. Subsequently, he continued to visit our office for treatment of periodontal disease with antibiotics,and external application of steroid and vitamin D ointments ; his skin condition has improved. Thus, we have reported a case of psoriatic erythroderma that improved after dental therapy and antibiotics. The importance of treating bacterial infections in psoriatic erythroderma should be recognized.
