Study sites and number of cases of extranodal NK/T-cell lymphoma by site and region
| Region . | Total cases, n . | Nasal NK/T-cell lymphoma, n (%) . | Extranasal NK/T-cell lymphoma, n (%) . | Aggressive NK-cell leukemia, n (%) . | Unclassifiable NK-cell lymphoma, n (%) . | All NK/T-cell cases, n (%) . |
|---|---|---|---|---|---|---|
| Bangkok, Thailand | 41 | 14 (34) | 7 (17) | 21 (51) | ||
| Hong Kong, China | 58 | 12 (21) | 5 (9) | 3 (5) | 20 (34) | |
| Singapore | 34 | 9 (27) | 8 (24) | 2 (6) | 19 (56) | |
| Seoul, Korea | 27 | 5 (19) | 6 (22) | 11 (41) | ||
| Tokyo, Japan | 32 | 4 (13) | 4 (13) | |||
| Nagoya, Japan | 54 | 9 (17) | 1 (2) | 10 (19) | ||
| Okayama, Japan | 36 | 7 (20) | 7 (19) | |||
| Fukuoka, Japan | 182 | 11 (6) | 1 (0.5) | 12 (7) | ||
| Asian total | 464 | 71 (15) | 27 (6) | 1 (0.2) | 5 (1) | 104 (22) |
| Europe and North America | 689 | 21 (3) | 8 (1) | 1 (0.1) | 2 (0.3) | 32 (5) |
| Region . | Total cases, n . | Nasal NK/T-cell lymphoma, n (%) . | Extranasal NK/T-cell lymphoma, n (%) . | Aggressive NK-cell leukemia, n (%) . | Unclassifiable NK-cell lymphoma, n (%) . | All NK/T-cell cases, n (%) . |
|---|---|---|---|---|---|---|
| Bangkok, Thailand | 41 | 14 (34) | 7 (17) | 21 (51) | ||
| Hong Kong, China | 58 | 12 (21) | 5 (9) | 3 (5) | 20 (34) | |
| Singapore | 34 | 9 (27) | 8 (24) | 2 (6) | 19 (56) | |
| Seoul, Korea | 27 | 5 (19) | 6 (22) | 11 (41) | ||
| Tokyo, Japan | 32 | 4 (13) | 4 (13) | |||
| Nagoya, Japan | 54 | 9 (17) | 1 (2) | 10 (19) | ||
| Okayama, Japan | 36 | 7 (20) | 7 (19) | |||
| Fukuoka, Japan | 182 | 11 (6) | 1 (0.5) | 12 (7) | ||
| Asian total | 464 | 71 (15) | 27 (6) | 1 (0.2) | 5 (1) | 104 (22) |
| Europe and North America | 689 | 21 (3) | 8 (1) | 1 (0.1) | 2 (0.3) | 32 (5) |
Among 8 Asian centers, HTLV-1 was endemic only in Fukuoka, Japan.