Thứ ba, 25 Tháng 3 2014 20:23

Gout Imaging Featured

Written by Edgar Colón, Jorge Vidal, Eduardo Labat, Gory Ballester and Angel Gomez
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Gout is a metabolic disorder that most commonly involves the feet, especially the first metatarsophalangeal joint, as well as the ankles, knees, hands, and elbows in asymmetric fashion. It is produced by a deposition of monosodium urate crystals in tissues with a poor blood supply, such as cartilage, tendon sheaths, and bursae. The radiographic features of gout typically do not appear until after 4 to 6 years of episodic arthritis. Radiographic features characteristic of gout include the following:

  • Tophi or periarticular soft-tissue nodules/masses created by the deposition of urate crystals that may contain calcium.
  • Tophi-induced periarticular or intra-articular bone erosion. Prominent cortical edges overhanging the tophi and well-defined bone erosions (with sclerotic margins) (Fig. 6-41) (54).
  • Random distribution, without marked osteoporosis.

FIGURE 6-41. Gout arthritis affecting the 1st MTP joint. There are large periarticular bone erosions with overhanging edges (arrow) and significant soft tissue swelling.

Refferences

Source: Physical Medicine and Rehabilitation - Principles and Practice
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