Pencil-in-cup deformity
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Pencil-in-cup deformity is the description given to one of the appearances on plain radiograph in psoriatic arthritis.
The appearance results from periarticular erosions and bone resorption giving the appearance of a pencil in a cup.
Although classically described with psoriatic arthritis, this appearance can also be seen in systemioc scleroisissystemic sclerosis, rheumatoid arthritis or reactive arthritis.
-<p><strong>Pencil-in-</strong><strong>cup deformity</strong> is the description given to one of the appearances on plain radiograph in <a href="/articles/psoriatic-arthritis">psoriatic arthritis</a>.</p><p>The appearance results from periarticular erosions and bone resorption giving the appearance of a pencil in a cup.</p><p>Although classically described with psoriatic arthritis, this appearance can also be seen in systemioc scleroisis, rheumatoid arthritis or reactive arthritis.</p>- +<p><strong>Pencil-in-</strong><strong>cup deformity</strong> is the description given to one of the appearances on plain radiograph in <a href="/articles/psoriatic-arthritis">psoriatic arthritis</a>.</p><p>The appearance results from periarticular erosions and bone resorption giving the appearance of a pencil in a cup.</p><p>Although classically described with psoriatic arthritis, this appearance can also be seen in systemic sclerosis, rheumatoid arthritis or reactive arthritis.</p>
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