Characteristics at presentation of three cases of apical lung bullae in marijuana smokers
| Case 1 | Case 2 | Case 3 | |
|---|---|---|---|
| FEV1=forced expiratory volume in 1 second; FVC=forced vital capacity; Tlco=carbon monoxide transfer factor; Kco=carbon monoxide transfer coefficient. | |||
| Age on presentation (years) | 33 | 45 | 38 |
| Sex | Male | Female | Male |
| Ethnic origin | Caucasian | Caucasian | Caucasian |
| Tobacco smoking history | 9 pack years | 10 pack years | 20 pack years |
| Marijuana smoking history | 2–3 joints/day, “heavy” 10 years | Weekends/evenings, “moderate” 10 years | 0.25 oz marijuana/week, “heavy” 24 years |
| Alpha1-antitrypsin (g/l) (normal range 1.1–2.1) | 1.4 | 2.3 | 1.6 |
| FEV1 (l) (% predicted) | 2.7 (64) | 2.4 (96) | 3.7 (90) |
| FVC (l) (% predicted) | 4.3 (85) | 3.3 (112) | 4.7 (94) |
| FEV1/FVC (%) | 63 | 73 | 79 |
| Tlco (% predicted) | 9.44 (81) | 4.99 (62) | – |
| Kco (% predicted) | 1.44 (88) | 1.10 (64) | – |