Involvement of knee and foot pathology presenting as an accompanying sign in a soldier of synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome

Synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome is expressed as chronic multifocal osteomyelitis. There is no report to show a knee/foot lesions accompanying with SAPHO syndrome. We herein present a case of SAPHO syndrome with involvement of pathology of knee and foot, which was confirmed by obtaining the images of skeletal scintigraphy. We also described the clinical indicators and imaging features.