“…Many features of this case are in line with prior PA literature, namely occurrence as symmetrical polyarthritis in a patient >50 years of age showing poor response to standard therapy with NSAIDs, glucocorticoids and DMARDs, yet complete vanishing of joint complaints after cancer treatment [ 2–4 ]. However, PA patients are usually male and seronegative for RF and CCP, which are detectable in only 23% and 11%, respectively [ 2 , 5 ].…”