Relationship between viral factors, axillary lymph node status and survival in breast cancer.
OBJECTIVE
Our previous study based on the results of polymerase chain reaction and Southern hybridization for the detection of Human papilloma virus (HPV), Cytomegalovirus (CMV), Epstein-Barr virus (EBV), Herpes simplex virus (HSV)-1, HSV-2, and Human herpesvirus (HHV)-8 DNA in non-familial breast cancer patients suggest that the viruses associated with breast cancer are HHV-8 > EBV (P < 0.01). Therefore, efforts were made to further investigate the association between breast cancer with nodal status and viral infections.


METHODS
Sixty-two breast cancer patients and their mammary specimens were enrolled in this retrospective study. The presence of these six potential oncogenic viruses was analyzed to establish the relationship between nodal status and treatment outcome. Statistical analyses were used for the assessment of variables, including viral positivity and clinical feature.


RESULTS
Viral positivity was not significantly different comparing node-positive and node-negative patients (P > 0.05). When the viral factors were not entered for statistical analyses, no variable was significantly related to overall survival. However, tumor stage, tumor size, nodal status , and estrogen receptor were significantly related to relapse-free survival (P < 0.05). For viral factors, the number of infecting viruses is related to the overall and relapse-free survivals. Only when V0 or V(0, 1) was grouped for comparison with other multiply virus-infected subgroups, were the overall and relapse-free survivals significantly different (P < 0.005 or P < 0.001). The results suggest that HSV-1, HHV-8, EBV, CMV, and HPV were related to overall survival, however, only HHV-8 and CMV were related to relapse-free survival (P < 0.05 or P < 0.01).


CONCLUSIONS
Virus factor is significantly related to human breast cancer, not only in terms of the oncogenetic process, but also in overall and relapse-free survivals.
Tsai
Ju-Hsin
JH
Department of Surgery, Chung Shan Medical University Hospital, Chung Shan Medical University, Taichung, Taiwan, ROC.
Hsu
Chun-Sen
CS
Tsai
Chung-Hung
CH
Su
Jang-Ming
JM
Liu
Yin-Tso
YT
Cheng
Min-Hsiung
MH
Wei
James Cheng-Chung
JC
Chen
Fong-Lin
FL
Yang
Chi-Chiang
CC
D000328:Adult; D001365:Axilla; D001943:Breast Neoplasms / Q000401:mortality* / Q000473:pathology / Q000821:virology*; D003587:Cytomegalovirus / Q000302:isolation & purification; D004279:DNA, Viral / Q000302:isolation & purification*; D018572:Disease-Free Survival; D005260:Female; D018259:Herpesvirus 1, Human / Q000302:isolation & purification; D018258:Herpesvirus 2, Human / Q000302:isolation & purification; D004854:Herpesvirus 4, Human / Q000302:isolation & purification; D019288:Herpesvirus 8, Human / Q000302:isolation & purification; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology* / Q000821:virology; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009367:Neoplasm Staging; D027383:Papillomaviridae / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D012189:Retrospective Studies; D012307:Risk Factors; D014777:Virus Diseases / Q000150:complications* / Q000821:virology
D004279:DNA, Viral