Table 3 Prevalence of MMTV like env sequence in human breast cancer samples and controls in published articles between 1995 and 2014 from different geographical location
Year | Geographic location | Breast cancer samples | Control samples | Reference | ||
|---|---|---|---|---|---|---|
Number | MMTV-like env positivity no. (%) | Number | MMTV-like env positivity no. (%) | |||
1995 | USA | 314 | 121 (38.5%) | 136 (29 fibroadenoma and 107 reduction mammoplasty) | 4 (2.9%) | [5] |
2000 | USA | 72 | 27 (37%) | 35 (25 negative biopsy, 5 reduction mammoplasty and 5 adjacent breast tissue) | 0 (0%) | [7] |
2001 | USA | 106 | 32 (30.1%) | 106 (paired breast tissue) | 1 (0.94) | [6] |
2003 | Australia | 45 Caucasian Australian, 120, Vietnamese 41 Vietnamese- Australian | 19 (42.2%) Caucasian Australian, 1(0.8%), Vietnamese 0 (0%) Vietnamese- Australian | 111 Australian and 60 Vietnamese (normal breast tissues) | 2 (1.8%) Australian and 0 (0%) Vietnamese | [17] |
2004 | Australia | 128 | 50 (40%) | – | – | [43] |
2004 | Australia | 136 +  13 male breast cancer | 43 (32%) +  8 (62%) | 164 (111 normal breast tissue,25 fibroadenoma, 4 hyperplasia, 25 fibrocystic) +  52 male (gynecomastia) | 15 (9%) +  10 (19%) | [44] |
2004 | Tunisia | 38 | 28 (73%) | – | – | [38] |
2006 | Italy | 45 | 15 (33%) | 40 (8 normal breast tissue, 4 blood from breast cancer patients, 20 other cancers and 8 blood from healthy blood donor) | 0 | [39] |
2007 | Mexico | 119 | 5 (4.2%) | – | – | [45] |
2008 | Australia | 50 | 28 (56%) | – | – | [10] |
2008 | Tunisia | 122 | 17 (13.9%) | 122 (adjacent breast tissue) | 0 (0%) | [34] |
2008 | Japan | 46 | 0 (0%) | 3 benign breast tumor | 0 (0%) | [35] |
2010 | Australia | 74 | 33 (45%) | 29 (reduction mammoplasty) | 0 (0%) | [37] |
2011 | Australia | 42 | 0 (0%) | – | – | [46] |
2012 | Australia | 50 | 39 (78%) | 40 (milk from normal lactating women) | 8 (32%) | [9] |
2012 | Iran | 50+  300 blood from breast cancer patient | 0 (0%) | 300 (blood from healthy donor) | 0 (0%) | [36] |
2013 | Mexico | 86 | 0 (0%) | 65 (adjacent breast tissue) | 0 (0%) | [47] |
2013 | Iran | 40 | 0 (0%) | – | – | [48] |
2014 | Mexico | 458 | 57 (12.4%) | 458 (adjacent breast tissue) | 72 (15.7%) | [33] |
2014 | Pakistan | 80+  80 paired blood samples | 16 (20%) | – | – | [40] |
2014 | Morocco | 42 | 24 (57%) | 18 (matched normal breast tissue from safety margins) | 6 (33.3%) | [41] |
2017 | Pakistan | 250 samples | 29.3% | – | – | [49] |
2017 | Myanmar | 58 samples | 1 (1.7%) | – | – | [50] |