Interaction of CD200 Overexpression on Tumor Cells with CD200R1 Overexpression on Stromal Cells: An Escape from the Host Immune Response in Rectal Cancer Patients

Table 1

Characteristic	Rectal Cancer RT Group	Normal RT Group	Rectal Cancer Untreated	Normal Untreated
	n = 61 ()	n = 55 ()	n = 79 ()	n = 66 ()
Sex
Male	36 (59)	27 (49)	45 (56)	33 (50)
Female	25 (41)	28 (51)	34 (44)	33 (50)
Age (years)	62.6	61.7	63.4	62.7
TNM
I + II + III	56 (91)		74 (94)
IV	5 (9)		5 (6)
Differentiation Grade
Good	5 (8)		4 (5)
Moderate	36 (59)		59 (75)
Poor	20 (33)		16 (20)
Metastasis
No	41 (67)		49 (62)
Yes	20 (33)		30 (38)
Recurrence
No	45 (74)		61 (77)
Yes	16 (26)		18 (23)

Patient characteristics. Rectal cancer RT group: rectal cancer patients underwent preoperative radiotherapy. Rectal cancer untreated: rectal cancer patients without any treatment prior to the operation. Normal RT group: normal rectal mucosa from rectal cancer RT group. Normal untreated: normal rectal mucosa from rectal cancer untreated group.