Table 1. Clinical characteristics of patients.
| Case | Group† | Age (y)/sex | Symptoms | Site | Size (cm)# | Treatment |
|---|---|---|---|---|---|---|
| 1* | IMT | 44/F | Chest pain | LLL, P | 2.5 | Lobectomy |
| 2 | IMT | 24/M | Cough, fever | RLL, P | 5.2 | Lobectomy |
| 3⬥* | IMT | 40/M | − | LLL, P | 2.0 | wedge resection |
| 4* | IMT | 23/M | Cough, hemoptysis | RML, P | 2.0 | Lobectomy |
| 5* | IMT | 48/M | Cough, chest pain | RML, P | 3.5 | Lobectomy |
| 6* | IMT | 66/F | Cough, hemoptysis | RUL, H | 6.3 | sleeve resection |
| 7* | IMT | 47/M | Cough, hemoptysis | RUL, H | 3.0 | sleeve resection |
| 8⬥ | IMT | 49/M | − | RUL, P | 3.0 | wedge resection |
| 9* | IMT | 44/M | Cough | RUL, P | 3.7 | Lobectomy |
| 10 | IgG4-related IPT | 35/F | Cough, chest pain | RLL, P | 2.5 | Lobectomy |
| 11⬥ | IgG4-related IPT | 63/F | − | LUL, P | 1.0 | Wedge resection |
| 12 | IgG4-related IPT | 55/F | Chest pain | LUL, P | 2.5 | Lobectomy |
| 13⬥ | IgG4-related IPT | 43/M | Cough, fever | RUL, P | 2.0 | Lobectomy |
| 14⬥ | IgG4-related IPT | 46/F | − | RLL, P | 1.0 | wedge resection |
| 15 | IgG4-related IPT | 48/M | Chest pain | LLL, P | 2.0 | wedge resection |
| 16 | IgG4-related IPT | 56/F | Cough, fever | RUL, P | 3.5 | Lobectomy |
| 17 | IgG4-related IPT | 34/F | Cough, hemoptysis | RUL, P | 2.5 | Lobectomy |
| 18 | IgG4-related IPT | 62/M | Chest pain | LLL, P | 1.8 | Lobectomy |
| 19⬥ | IgG4-related IPT | 52/M | Chest pain | RLL, P | 2.8 | wedge resection |
| 20 | IgG4-related IPT | 41/M | − | RLL, P | 1.0 | Lobectomy |
| 21 | IgG4-related IPT | 46/F | Chest pain | LLL, P | 3.0 | Lobectomy |
| 22⬥ | IgG4-related IPT | 46/M | Hemoptysis | RLL, P | 2.0 | Lobectomy |
| 23 | IgG4-related IPT | 61/F | Cough, fever | RUL, P | 2.5 | Lobectomy |
| 24 | IgG4-related IPT | 33/M | Chest pain, fever | RLL, P | 2.2 | wedge resection |
| 25 | IgG4-related IPT | 38/M | − | RLL, P | 3.0 | Lobectomy |
| 26 | IgG4-related IPT | 39/M | Cough | LUL, P | 2.5 | Lobectomy |
†, The grouping was based on the new criteria for differential diagnosis proposed in our study; #, nodule sizes were measured from pathological specimens or from described by operational records; ⬥, the patients received CT guided biopsy of the lesions; *, the patients were confirmed as ALK-1 positive; M, male; F, female; RLL, right lower lobe; RUL, right upper lobe; RML, right middle lobe; LLL, left lower lobe; LUL, left upper lobe; P, peripheral pulmonary fields; H, hilar parts of the lungs; IMT, inflammatory myofibroblastic tumor; IgG4-related IPT, IgG4-related inflammatory pseudotumor (IPT).