A Child with X-Linked Agammaglobulinemia and Enthesitis-Related Arthritis

Table 1

Laboratory evaluation of the synovial fluid and blood performed in a 12-year-old boy with X-linked agammaglobulinemia and recurrent knee effussions over a period of 5 years.

Lab investigations	04/2010	03/2008	08/2007	03/2006	07/2005
Synovial fluid WBC (cells/mm^3)	110	30,960	27,000	40,000	220
Synovial fluid culture	Neg	Neg	Neg	Neg	Neg
Crypto/Cocci Ag/fungal stain and Cx	Neg	Neg	Neg	Neg	Neg
Atypical mycobacterium/mycoplasmas/ureaplasma	Neg	Neg	Neg	Neg	Neg
AFB	Neg	Neg	neg	neg	neg
ESR mm/hr-CRP mg/dL	60/5.1	41/4.1	30/13.5	34/7.5	40/2.3
Blood culture and viral cultures	Neg	Neg	Neg	Neg	Neg