Abstract

Calcium pyrophosphate dihydrate (CPPD) crystal is widespread in elderly persons and has various clinical presentation that can be confounding to clinicians. It is characterized by acute, subacute, or chronic joint inflammation and deposition of CPPD crystals in hyaline cartilage, fibrocartilage, and other soft tissue structures. We have learned a great deal about imaging findings of CPPD crystal deposition disease. New facts about the disorder and clues to radiologic diagnosis continue to be revealed. This article will provide a review of imaging characteristics of this disease with emphasis on some recent findings. The nomenclature, epidemiology, classification, and pathophysiology will be explained. A discussion of the clinical manifestations and treatment will be followed by a review of the characteristic imaging features.

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