<prompt> All are Characteristic of SAPHO syndrome exceptSynovitisAcnePustulosisHyperpigmentation  <response>: The syndrome of synovitis, acne, pustulosis, hyperostosis, and osteitis SAPHO characterized by a variety of skin and musculoskeletal manifestations. Dermatologic manifestations include palmoplantar pustulosis, acne conglobate, acne fulminans, and hidradenitis suppurativa. Reference: Harrison;s Principles of Internal Medicine; 19th edition; Chapter 385; Vasculitis Syndromes 