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Right upper lobe.
| Artery variants | Abbreviation | Frequency |
|---|---|---|
| RA1+2rec+3 | 1+2+3 | 18% |
| RA1+2rec+3, RA2asc | 1+2+3, 2 | 39% |
| RA1+2rec+3b, RA3a | 1+2+3, 3 | 4% |
| RA1+2rec+3ai+b, RA2asc+3aii | 1+2+3, 2 + 3 | 2% |
| RA1+3, RA2asc | 1+3, 2 | 18% |
| RA1+2rec+3b, RA2asc, RA3a | 1+2+3, 2, 3 | 8% |
| RA1+2rec+3a, RA2asc, RA3b | 1+2+3, 2, 3 | 4% |
| RA1+3b, RA2asc, RA3a | 1+3, 2, 3 | 4% |
| RA1+3a, RA2asc, RA3b | 1+3, 2, 3 | 3% |
rec, recurrent; asc, ascending.
