We report a patient with secondary systemic amyloidosis complicating a
rthropathic psoriasis. At autopsy amyloidosis was observed in the sple
en, kidneys, liver, gastrointestinal tract, lung, heart, pancreas, adr
enal glands, thyroid and gall-bladder in addition to the skin by histo
logical, histochemical and ultrastructural studies. The amyloid deposi
ts in these organs were of amyloid A protein type.