ABSTRACT
Objective To study the clinical and the X-ray characteristics of the yaws disease in bone.Methods The clinical features and X-ray imaging appearances of 12 cases with bone yaws were analyzed and summarized,and discussed with related cultural heritage.Results Nine patients were period Ⅱ yaws,whose skin of all extremities were detected multiple symmetry or no-symmetry papulas and nodes,with systematic toxic symptom.There patients were period Ⅲ yaws,with multiple brown abscess in and under the skin of all extremities,multiple bayberrylike nodes up and down surrounding the ulcer.In the(9 patients) with period Ⅱ yaws,the bone lesions were predominantly periosteal proliferation and hyperostosis.In the 3 patients with period Ⅲ yaws,the bone lesions were hyperostosis with destruction of bone.Conclusion The X-ray characteristics of bone yaws are:(1) multiple bones are involved;(2)the pathological change is mainly located in the long bone diaphysis;(3) local irregular periosteal proliferation and cortical hyperplassia,medullary canal blurring or disappearing;(4)diffusing long bone sclerosis with cortical bone destruction and cancellated bone erosion;(5)the bones involved has no sequestra.