Table 1.
Involvement of lobes and segments in 74 cases of active TB.
| Right lung | Left lung | ||
|---|---|---|---|
| Most affected segment | Number and percentage of cases | Most affected segment | Number and percentage of cases |
| Apical segment of the right upper lobe (1) | 47 (63.5) | Apical-posterior segment of the left upper lobe (1/2) | 55 (74.3) |
| Posterior segment of the right upper lobe (2) | 49 (66.2) | Anterior segment of the left upper lobe (3) | 32 (43.2) |
| Anterior segment of the right upper lobe (3) | 34 (45.9) | Upper segment of the lingular lobe (4) | 26 (35.1) |
| Lateral segment of the middle lobe (4) | 21 (28.3) | Lower segment of the lingular lobe (5) | 25 (33.7) |
| Medial segment of the middle lobe (5) | 21 (28.3) | Apical segment of the left lower lobe (6) | 39 (52.4) |
| Apical segment of the right lower lobe (6) | 31 (41.8) | Anterior-medial segment of the left lower lobe (7/8) | 21 (28.3) |
| Medial segment of the right lower lobe (7) | 13 (17.5) | Lateral segment of the left lower lobe (9) | 23 (31) |
| Anterior segment of the right lower lobe (8) | 15 (20.2) | Posterior segment of the left lower lobe (10) | 19 (25.6) |
| Lateral segment of the right lower lobe (9) | 16 (21.6) | ||
| Posterior segment of the right lower lobe (10) | 15 (20.2) | ||
L, lobe; U, upper; R, right; Le, left; Lo, lower.