Resnick D, Broderick T W
J Can Assoc Radiol. 1977 Sep;28(3):187-9.
Twenty-eight per cent of our patients with psoriatic arthritis involving the feet demonstrated osseous proliferation and increased radiodensity of the terminal phalanges. This sign, the "ivory" phalanx, is a poorly recognized radiographic manifestation of the disease, but is particularly important in the absence of articular abnormality or of resorption of the tufts. It is almost invariably associated with nail diseases of the same digit.
在我们患有累及足部的银屑病关节炎患者中，28%表现出指骨末端骨质增生和放射密度增加。这种“象牙”指骨体征是该疾病一种鲜为人知的影像学表现，但在没有关节异常或指骨粗隆吸收的情况下尤为重要。它几乎总是与同一手指的指甲疾病相关。
