Angiogenesis and dendritic cell density are not correlated with metachronous distant metastasis in curatively operated rectal cancer.
OBJECTIVE
Apart from surgery, treatment of rectal cancer increasingly involves the use of (neo-)adjuvant strategies. To optimize the selection process for these therapy regimens, especially in the field of cellular and molecular biology, new prognostic factors additional to the established TNM system are being investigated.


METHODS
Two groups of patients ( n=2x85) with rectal carcinoma curatively treated by surgery alone were studied retrospectively (median follow-up 6.1 years). To exclude the effect of the surgeon only patients free of locally recurrent disease were selected. Patient groups were matched for age, gender, UICC stage, and year of operation (1982-1991) and differed only in subsequent metachronous distant metastatic spread, i.e., the criterion to be studied. The factors investigated in uni- and multivariate analysis were angiogenesis, density of dendritic cells, grading, venous invasion, and lymphatic invasion.


RESULTS
Grading invariably proved to be the only significant prognostic factor. In univariate analysis the absence of venous invasion was also correlated significantly with increased disease-free survival.


CONCLUSIONS
Angiogenesis and dendritic cell density are not prognostic factors for metachronous distant metastasis in rectal cancer and therefore cannot serve as selection parameters for adjuvant therapy.
Günther
K
K
Department of Surgery, University of Erlangen, Krankenhausstrasse 12, 91054, Erlangen, Germany. Klaus.guenther@rzmail.uni-erlangen.de
Radkow
T
T
Reymond
M A
MA
Pflüger
R
R
Dimmler
A
A
Hohenberger
W
W
Papadopoulos
T
T
D000367:Age Factors; D014408:Biomarkers, Tumor / Q000032:analysis*; D002277:Carcinoma / Q000473:pathology* / Q000601:surgery*; D003713:Dendritic Cells; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020360:Neoadjuvant Therapy; D009362:Neoplasm Metastasis / Q000503:physiopathology*; D009367:Neoplasm Staging / Q000379:methods*; D009389:Neovascularization, Pathologic; D010347:Patient Care Planning; D011237:Predictive Value of Tests; D011379:Prognosis; D012004:Rectal Neoplasms / Q000473:pathology* / Q000601:surgery*; D012189:Retrospective Studies; D012737:Sex Factors
D014408:Biomarkers, Tumor