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Romanian Journal of Rheumatology, Volume XXV, No. 3, 2016
ISSN 1843-0791  |  e-ISSN 2069-6086
ISSN-L 1843-0791
DOI: 10.37897/RJR

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General features of calcium pyrophosphate deposition disease

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ABSTRACT

Background. Calcium pyrophosphate deposition (CPPD) disease is due to deposition of calcium pyrophosphate to hyaline cartilage, fibrocartilage and soft tissues. Clinical presentation may be as acute arthritis, chronic arthritis and associated with osteoarthritis. CPPD can be idiopathic or secondary, due to different metabolic diseases.
Objectives. The aim of this study was to evaluate the clinical characteristics, secondary causes and risk factors of symptomatic CPPD.
Material and methods. Patients diagnosed with CPPD upon presentation for joint pain and/or limitation of motion in Cluj-Napoca Rheumatology Department, were prospectively included in the study. Demographic data, clinical features, laboratory parameters for secondary causes of CPPD and risk factors were recorded.
Results. The study included 40 patients with CPPD. A percentage of 70% patients presented with acute arthritis. The knee was the most affected joint. During the assessment for secondary CPPD, three patients with hypomagnesaemia and one patient with hypophosphatasia were found. Screening for alkaptonuria was negative in all patients tested (30 patients). Regarding risk factors, 65% of patients were over 60 years old, osteoarthritis was associated in 80% of cases, joint injury in 2%, meniscectomy in 6%, diuretics use in 18%, family history of CPPD 2%.
Conclusions. Acute arthritis of the knee is the most frequent form of CPPD presentation. Ageing and osteoarthritis are common risk factors for CPPD. Although secondary causes of CPPD are rare, screening is very important.

Keywords: CPPD, clinical features, secondary causes, risk factors

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