Pseudogout

Background

Calcium pyrophosphate dihydrate (CPPD) - rhomboid shaped positive birefringence

Diagnosis

acute attacks of mono or oligoarticular inlammatory arthritis

progressive joint deenerative changes similar to OA

Evolves over days

Age > 50

Knee, wrists, ankles, elbows

Systemic illness, surgery, trauma triggers

Assoc with hyperparathyroidism and hemochromatosis

See Also

Gout