Chondrocalcinosis Consistent with CPPD

Definition and Pathologic Basis

Chondrocalcinosis is the radiographic or pathologic finding of calcium deposits in cartilage, and when consistent with CPPD, it represents the deposition of calcium pyrophosphate dihydrate crystals in both hyaline articular cartilage and fibrocartilage of joints 1, 2

CPPD presents with highly variable clinical manifestations, ranging from completely asymptomatic radiographic findings to severe inflammatory and destructive arthropathy 3, 4, 5
Asymptomatic chondrocalcinosis is common in elderly patients and requires no treatment, according to the American College of Rheumatology 3, 4, 6
Osteoarthritis with CPPD can lead to degenerative changes with superimposed crystal deposition, potentially accelerating joint destruction 3, 4

The prevalence of radiographic chondrocalcinosis increases dramatically with age, affecting approximately 13% across all age groups but rising substantially after age 70, as reported by the European League Against Rheumatism (EULAR) 1, 2
Prevalence reaches 10-15% in patients aged 65-75 years and exceeds 40% in those over 80 years old 1, 2

The 2023 EULAR imaging recommendations emphasize that conventional radiography remains a key diagnostic modality for identifying chondrocalcinosis, though ultrasound and CT can also detect crystal deposits 1, 2

CPPD is three times more likely in patients with primary hyperparathyroidism (OR=3.03, 95% CI 1.15 to 8.02), and is also associated with hemochromatosis, hypomagnesemia, and hypophosphatasia, according to the American College of Rheumatology 7, 8

Unlike gout, there is currently no treatment to prevent CPP crystal formation or enhance their dissolution, as stated by the European League Against Rheumatism (EULAR) 9, 10
Elevated inorganic pyrophosphate levels drive crystal formation, but no pharmacologic agents are available to modulate this process in clinical practice 9, 10