Table 1.

Characterization of type I Hodgkin-like lesion and type II CHL-RT

	Type I	Type II
Number (N)	26	51
Median age in years (range)*	62 (42-86)	73 (46-85)
Gender (M:F ratio)	19:7 (2.7)	31:20 (1.6)
Prior CLL diagnosis#	27% (7/26)	73% (37/51)
Sites (N)#	LN 25, BM 1	LN 33, Spleen 4, BM 8, extranodal 6§
CD20+	52% (12/23)	47% (23/49)
PAX-5+	100% (20/20)	100% (31/31)
CD30+	100% (26/26)	100% (51/51)
CD15+	78% (18/23)	92% (46/50)
EBV+	65% (17/26)	75% (38/51)
ZAP-70+	57% (8/14)	32% (6/19)
Clonally related	29% (4/14)	53% (10/19)

^*p=0.01 by student t-test

^#p<0.005 by Fisher exact test,

^§Includes liver (2), lung (2), pleura (1), and stomach (1).