Abstract
Pyoderma gangrenosum (PG) is a rare disorder from the group of neutrophilic dermatoses, partly as a serious comorbidity in rheumatoid arthritis. The main form of its clinical manifestation is abacterial necrotizing skin ulceration (-s) with irregular, indurative and violaceous border (espec. trunk/LE).
The present study demonstrates a serious form of PG in a 73y old man; the last form of PG composite diagnostic criteria (2017) was completely fulfilled, and the observation was also associated with the following important aspects: (a) clinical manifestation of PG and elderly onset (ACPA and RFs isotypes seropositive) rheumatoid arthritis (EORA) were parallel, (b) PG ulceration was present as a masquerading phenomenon of fibrinoid-necrotic (rheumatoid) arteritis, and (c) the response to long-term glucocorticoid-cyclosporine combination was slow, but up to the presence persistent. Observation of the triade "pyoderma gangrenosum - rheumatoid arthritis - necrotizing arteritis" may be consider as an inspirative combination both in complicated pathways, and also as an important clinical problem.