TABLE II.

Comparison between the size and concentration of different cells types in human blood with those of CTCs.

Cell type		Concentration cells/ml	Diameter (μm)
Red blood cells (RBCs)		4.6–6.2 × 109 (in males)	6–8 (disk shape 2–2.5 μm-thick)
		4.2–5.4 × 109 (in females)
Platelets (thrombocytes)		1.5–4 × 108	2–3
White blood cells (WBCs)	Neutrophils	3–5.8 × 106	10–12
	Eosinophils	5–25 × 104
	Basophils	1.5–5 × 104	12–15
	Lymphocytes	1–3 × 106	7–8 (small lymphocytes) 12…15 (large lymphocytes)
	Monocytes	3–5 × 105	15…30
	Total	4.5–11 × 106	-
CTCs		1–10	12–27