PSTPIP1 and bacterial arthritis: Furthermore, PSTPIP1-associated inflammatory diseases also demonstrate pyogenic arthritis, PG, acne, and hidradenitis suppurativa syndrome (PAPASH) [6], pyogenic arthritis, PG, and acne-like syndrome (PAPA-like) [7], as well as PG, acne, and ulcerative colitis syndrome (PAC) [8].