CRP and synovial sarcoma: Both EN and SS can be associated with elevated white blood cell (WBC) counts with neutrophilia, increased C-reactive protein (CRP) levels, and a heightened erythrocyte sedimentation rate (ESR), with greater elevation typically seen in SS [4]. There are slight differences between SS and EN, with EN generally showing milder leukocytosis and CRP elevation compared to SS, which often presents with higher rates of fever, leukocytosis, and elevated CRP or ESR.