Table 1. Number of dogs that had positive IF labeling with antibodies against canine IgG, IgM, IgA and C3.

	Control (n = 11)		Neoplasia (n = 29)		p
	positive IF	Intensity median (min-max)	positive IF	Intensity median (min-max)
IgMa	3	0 (0–0.5)	28	2 (0–3)	<0.0001
IgGb	0	0 (0–0)	5	0 (0–2)	0.125
IgAc	0	0 (0–0)	7	0 (0–2)	0.015
C3d	0	0 (0–0)	5	0 (0–2)	0.062

^aIgM: immunoglobulin M; IgG

^b: immunoglobulin G; IgA

^c: immunoglobulin A; C3

^d: complement C3