Table 1.
Relative frequency of primary cutaneous lymphoma subtypes in this study and in previous reports from other countries.
| This study (n = 627) | Our previous study, 2016 (n = 289)2 | Japan, 2020 (n = 2090)6 | Argentina, 2019 (n = 416)7 | France, 2020 (n = 8593)8 | |
|---|---|---|---|---|---|
| n (%) | n (%) | (%) | (%) | (%) | |
| Mature T-and NK-cell lymphomas | 547 (87.2) | 244 (84.4) | 77.0 | 93.0 | 72.5 |
| Mycosis fungoides | 239 (38.1) | 85 (29.4) | 48.0 | 75.7 | 37.8 |
| Sézary syndrome | 4 (0.6) | No data | 1.1 | 3.1 | 5.1 |
| Primary cutaneous anaplastic large cell lymphoma | 73 (11.6) | 34 (11.8) | 6.0 | 3.6 | 2.1 |
| Lymphomatoid papulosis | 98 (15.6) | 46 (15.9) | 3.2 | 3.6 | 6.1 |
| Primary cutaneous extranodal NK/T-cell lymphoma | 35 (5.6) | 28 (9.7) | 2.1 | 1.7 | 0.6 |
| Subcutaneous panniculitis-like T-cell lymphoma | 38 (6.1) | 21 (7.3) | 2.0 | 1.2 | 1.0 |
| Primary cutaneous CD4-positive small/medium T-cell lymphoproliferative disorder | 22 (3.5) | 3 (1.0) | 1.8 | 0.2 | 3.7 |
| Primary cutaneous peripheral T-cell lymphoma, NOS | 38 (6.1) | 27 (9.3) | 5.0 | 1.9 | 2.0 |
| Mature B-cell lymphomas | 80 (12.8) | 40 (13.8) | 21.1 | 6.7 | 26.4 |
| Primary cutaneous marginal zone lymphoma | 50 (8.0) | 24 (8.3) | 5.6 | 2.2 | 10.0 |
| Primary cutaneous diffuse large B-cell lymphoma, leg type | 26 (4.1) | 14 (4.8) | 8.5 | 0.5 | 2.3 |
| Primary cutaneous follicle center lymphoma | 3 (0.5) | 1 (0.4) | 3.6 | 2.9 | 10.1 |
| EBV-positive mucocutaneous ulcer | 1 (0.2) | 0 (0) | No data | No data | No data |