19 March 2025
: Case report 
Bilateral Knee Synovial Chondromatosis in a 2-Year-Old Girl: First Reported Case and Literature Review
Challenging differential diagnosis, Rare disease
Ana Paula Fernandes Barbosa ABDE 1,2, Paulyana Fernandes Barbosa Quintino ABDE 1,3, Hermann Fernandes Motta Camara BEF 4, Pedro Henrique Laurindo dos Anjos BEF 4, Arthur Castro Guimaraes
BEF 4, Eloisio Barbosa Lopes Neto ABDF 5, Maria Eugenia Leite Duarte ADEF 6*
DOI: 10.12659/AJCR.945921
Am J Case Rep 2025; 26:e945921
Table 1. Initial blood test.
| Compound | Result | Reference range |
|---|---|---|
| C-reactive protein (mg/L) | 23.1 | <5 |
| Anti-CCP antibodies (U/mL) | 5.89 | <20 |
| Anti-Ro/SSA antibodies (U/mL) | <0.4 | <7 |
| Anti-La/SSB antibodies (U/mL) | <0.4 | <7 |
| Rheumatoid factor (U/mL) | <8 | <20 |
| Synovial fluid culture | Negative for bacteria or fungi growth | – |