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Table 3 Detection of CK20 positive tumor cells (CTC) in the blood of patients with rectal cancer after neoadjuvant RCTX

From: Cytokeratin 20 positive circulating tumor cells are a marker for response after neoadjuvant chemoradiation but not for prognosis in patients with rectal cancer

Variable Category Rate of CK20 positive CTC χ2-test (p-values)
RCTX Responder 27.2 % (6/22) p = 0.030
  Non-responder 54.4 % (31/57)  
Tumor localisation Upper 1/3 54.5 % (6/11) p = 0.848
  Middle 1/3 46.3 % (19/41)  
  Lower 1/3 44.4 % (12/27)  
pN- Status pN+ 55.8 % (19/34) p = 0.161
  pN- 40 % (18/45)  
UICC Stage I 30,4 % (7/23) p = 0.265
  II 52.3 % (11/21)  
  III 51.7 % (15/29)  
  IV 66.6 % (4/6)