A physical examination will show:
A complete blood count ( CBC) may show decreased number of white blood cells called neutrophils.
An abdominal ultrasound may confirm a swollen spleen.
Pinals RS. Felty's syndrome. In: Firestein GS, Budd RC, Harris Jr. ED, McInnes IB, Ruddy S, eds. Kelley's Textbook of Rheumatology. 8th ed. Philadelphia, Pa: WB Saunders; 2008: chap 68.