Table 2.
Histologic subtype distribution (%) according to reviewed histology of 737 cases registered in the T-cell project by geographic region
| Overall | Europe | USA | South America | Middle/Far East | |
| PTCL-NOS | 38 | 40 | 42 | 42 | 26 |
| AITL | 17 | 20 | 21 | 8 | 15 |
| ALCL, ALK- | 13 | 14 | 9 | 23 | 6 |
| ALCL, ALK+ | 7 | 6 | 8 | 8 | 4 |
| NK/T nasal, nasal type, lymphoma/leukemia | 13 | 6 | 9 | 13 | 31 |
| Other histologies | 12 | 14 | 11 | 6 | 18 |
PTCL: Peripheral T-cell lymphomas; NOS: Not otherwise specified; AITL: Angioimmunoblastic T-cell lymphoma; ALCL: Anaplastic large cell lymphomas; ALK: Anaplastic lymphoma kinase; NK: Natural killer