The shadow of soft tissue swelling could only be seen by X-ray.
线早期仅有软组织肿胀阴影，个别可见结节样阴影。
Periosteal reaction was usually absent but soft tissue swelling commonly occurred.
一般无骨膜反应，但可有软组织肿块。
By day 18, periosteal new bone formation was seen definitely, destruction of bone decreased, bone density around articular increased, and the swelling of soft tissue subsided.
第18天，可见明确的骨膜新生骨形成，骨质破坏区缩小，关节周围骨质密度增高，软组织肿胀减轻。
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