[A case of psoriatic arthropathy complicated with HTLV-I carrier and secondary amyloidosis].

We report a case of psoriatic arthropathy complicated with HTLV-I carrier and secondary amyloidosis. She was a 45-year-old woman and was diagnosed as psoriatic arthropathy and HTLV-I carrier in December 1999. She was treated with combination therapy corticosteroid, salazosulfapyridine, methotrexate, cyclophosphamide, and gold sodium. However, her arthralgia and fever was not completely improved. In April in 2001, she was admitted to our hospital because of nausea, vomiting, and diarrhea. Her colon fiberscopic examination showed rubber, erosion, and multiple ulcers of the rectum through descending colon mucosa. Her biopsied specimens of the colon mucosa showed Congo Red dye stained amyloid deposits. Because the loss of stain for Congo Red dye after exposure to potassium permanganate, the deposits were amyloid A protein. This case is considered as a rare case of psoriatic arthropathy and HTLV-I carrier complicated with secondary amyloidosis in a relatively short period (approximately two years) after onset of psoriatic arthropathy.