A severe case of erythrodermic psoriasis with pseudoseptic arthritis from psoriasic arthritis: a case report

Abstract

          Erythrodermic psoriasis (EP) is an uncommon and severe form of psoriasis. Patient with psoriatic arthritis can suddenly develop erythrodermic psoriasis.1 We reported a case of 30-year-old Thai male with underlying of plaque-type psoriasis and psoriasic arthritis. In this admission at Krabi hospital, he presented with severe erythrodermic psoriasis with left knee and left hip pain. He was treated as septic arthritis but his left knee was not improved. Further investigation was done and it was determined that he had pseudoseptic arthritis from psoriasic arthritis. Nonsteroidal anti-inflammatory drug (NSAIDs), methotrexate, cyclosporine, and sulfasalazine were prescribed and the antibiotics were discontinued. The clinical was gradually improved. Among various causes of arthritis, septic arthritis is worrisome. There were reports of pseudoseptic arthritis which clinical presentation and synovial fluid profiles could mimic septic arthritis. We reported a case of erythrodermic psoriasis and severe psoriatic arthritis which presented as pseudoseptic arthritis.