Table 1. Viral DNA found in tumour by microarray analysis.
| Lung cancer cell type | HPV (human papillomavirus, type 57) | HBV (hepatitis B virus) | HTLV-2 (human T-cell lymphotropic virus 2), a Delta-retrovirus | Bovine leukaemia virus (BLV, a Delta-retrovirus, similar to HTLV-1) | Y53 sarcoma virus (an Alpha-retrovirus) | STLV-1, 2, or 6 (simian T-cell lymphotropic viruses), all Delta retroviruses |
|---|---|---|---|---|---|---|
| Squamous cell ca. (n=10) | 6 (60%) | 9 (90%) | 7 (70%) | 8 (80%) | 0 | 6 (60%) |
| Adenoca. (n=10) | 1 (10%) | 2 (20%) | 0 | 0 | 6 (60%) | 1 (10%) |
| Adenoca. with lepidic spread (n=10) | 0 | 0 | 0 | 0 | 1 (10%) | 0 |
| Adenoca. stage IV (n=7) | 0 | 0 | 0 | 0 | 1 (14%) | 0 |
| Squamous cell ca. stage IV (n=3) | 0 | 0 | 0 | 0 | 1 (33%) | 0 |
| Normal lung (n=10) | 0 | 0 | 0 | 0 | 0 | 0 |
Abbreviations: Adenoca.=adenocarcinoma; Ca.=carcinoma; HPV=human papillomavirus; HBV=hepatitis B virus; HTLV-2=human T-cell lymphotropic virus-2; BLV=bovine leukaemia virus; STLV-1=Simian T-cell lymphotrophic virus-1.