Calcium pyrophosphate dihydrate crystal deposition disease
Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as pseudogout and pyrophosphate arthropathy, is a rheumatologic disease which is thought to be secondary to abnormal accumulation of calcium pyrophosphate dihydrate crystals within joint soft tissues. The knee joint is most commonly affected. The disease is metabolic in origin and its treatment remains symptomatic.
| Calcium pyrophosphate dihydrate disease | |
|---|---|
| Other names | Pseudogout |
| Polarized light microscopy of CPPD, showing rhombus-shaped calcium pyrophosphate crystals with positive birefringence. | |
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