Demographic characteristics and clinical information of the 76 patient with small sclerosing pneumocytoma
| Variables | Frequency | Percentage | |
| Age (years) | 30–39 | 6 | 7.9 |
| 40–49 | 18 | 23.7 | |
| 50–59 | 25 | 32.9 | |
| 60–69 | 18 | 23.7 | |
| 70–79 | 9 | 11.8 | |
| Sex | Male | 7 | 9.2 |
| Female | 69 | 90.8 | |
| Tumour size | 0–0.5 cm | 21 | 27.6 |
| 0.6–1.0 cm | 55 | 72.4 | |
| Location | Right upper lobe | 12 | 15.8 |
| Right middle lobe | 13 | 17.1 | |
| Right lower lobe | 15 | 19.7 | |
| Left upper lobe | 13 | 17.1 | |
| Left lower lobe | 23 | 30.3 | |
| Number | Solitary | 73 | 96.1 |
| Multiple* | 3 | 3.9 | |
| Concomitant lesion | No | 29 | 38.2 |
| AIS | 23 | 30.3 | |
| MIA | 10 | 13.2 | |
| Invasive adenocarcinoma | 7 | 9.2 | |
| Thymic tumour | 2 | 2.6 | |
| Granuloma | 3 | 3.9 | |
| Inflammation | 2 | 2.6 | |
| CT† | Solid and well demarcated | 61 | 80.3 |
| Solid and obscure boundary | 6 | 7.9 | |
| Ground-glass opacity | 4 | 5.3 | |
| No sign | 4 | 5.3 |
*Case 1: a 1.2 cm nodule and a 0.7 cm nodule located in the left lower lobe separately. Case 2: a 3.5 cm nodule was at the dorsal segment of the left lower lobe, and two nodules measuring 1.0 cm and 0.4 cm in diameter were at the segment of the same lobe. Case 3: a 9.0 cm tumour mass and two satellite nodules measuring 0.2 cm and 0.5 cm separately were present in the right middle lobe.
†Seventy-five cases had CT images at Shanghai Chest Hospital.
AIS, Adenocarcinoma in situ; MIA, Microinvasive adenocarcinoma.