Generally, a few large joints are involved, such as hip or knee.

主要累及大关节，比如髋关节或膝关节。

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It can also affect large joints, such as the hips and knees and about a third of people with psoriatic arthritis also have a stiff painful lower back or neck.

它也能影响大关节如髋关节和膝关节，大约三分之一患这种病的人同样有腰部和颈部疼痛僵硬症状。

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