Bone marrow features in 183 patients with thrombocytosis
| Diagnosis . | Essential thrombocythemia (n = 164) no. (%) . | Reactive thrombocytosis (n = 19) no. (%) . |
|---|---|---|
| Bone marrow karyotype | ||
| Available | 151 (92.1) | 14 (73.7) |
| Normal | 125 (82.5) | 14 (100) |
| Abnormal | 26 (17.5) | 0 |
| Megakaryocyte number | ||
| 1 | 29 (17.7) | 10 (52.6) |
| 2 | 68 (41.5) | 9 (47.4) |
| 3 | 46 (28.0) | 0 |
| 4 | 21 (12.8) | 0 |
| Megakaryocyte clustering | ||
| 0 | 16 (9.8) | 18 (94.7) |
| 1 | 60 (36.6) | 1 (5.3) |
| 2 | 88 (53.6) | 0 |
| Reticulin fibrosis | ||
| 0 | 76 (46.3) | 19 (100) |
| 1 | 54 (33.0) | 0 |
| 2 | 24 (14.6) | 0 |
| 3 | 10 (6.1) | 0 |
| 4 | 0 | 0 |
| Osteosclerosis grade | ||
| 0 | 146 (89.1) | 19 (100) |
| 1 | 15 (9.2) | 0 |
| 2 | 3 (1.7) | 0 |
| Microvessel grade | ||
| 1 | 61 (37.2) | 15 (79.0) |
| 2 | 75 (45.8) | 4 (21.0) |
| 3 | 26 (15.8) | 0 |
| 4 | 2 (1.2) | 0 |
| c-Mpl grade | ||
| 1 | 5 (3.0) | 11 (57.9) |
| 2 | 5 (3.0) | 6 (31.6) |
| 3 | 43 (26.2) | 2 (10.5) |
| 4 | 111 (67.8) | 0 |
| Diagnosis . | Essential thrombocythemia (n = 164) no. (%) . | Reactive thrombocytosis (n = 19) no. (%) . |
|---|---|---|
| Bone marrow karyotype | ||
| Available | 151 (92.1) | 14 (73.7) |
| Normal | 125 (82.5) | 14 (100) |
| Abnormal | 26 (17.5) | 0 |
| Megakaryocyte number | ||
| 1 | 29 (17.7) | 10 (52.6) |
| 2 | 68 (41.5) | 9 (47.4) |
| 3 | 46 (28.0) | 0 |
| 4 | 21 (12.8) | 0 |
| Megakaryocyte clustering | ||
| 0 | 16 (9.8) | 18 (94.7) |
| 1 | 60 (36.6) | 1 (5.3) |
| 2 | 88 (53.6) | 0 |
| Reticulin fibrosis | ||
| 0 | 76 (46.3) | 19 (100) |
| 1 | 54 (33.0) | 0 |
| 2 | 24 (14.6) | 0 |
| 3 | 10 (6.1) | 0 |
| 4 | 0 | 0 |
| Osteosclerosis grade | ||
| 0 | 146 (89.1) | 19 (100) |
| 1 | 15 (9.2) | 0 |
| 2 | 3 (1.7) | 0 |
| Microvessel grade | ||
| 1 | 61 (37.2) | 15 (79.0) |
| 2 | 75 (45.8) | 4 (21.0) |
| 3 | 26 (15.8) | 0 |
| 4 | 2 (1.2) | 0 |
| c-Mpl grade | ||
| 1 | 5 (3.0) | 11 (57.9) |
| 2 | 5 (3.0) | 6 (31.6) |
| 3 | 43 (26.2) | 2 (10.5) |
| 4 | 111 (67.8) | 0 |