Patient Demographics
| No. of patients | 358 |
| Prior therapy | |
| None | 179 |
| Splenectomy alone | 44 |
| Interferon alone | 78 |
| Splenectomy, interferon | 47 |
| Splenectomy, interferon, 2′-deoxycoformycin | 4 |
| Interferon, 2′-deoxycoformycin | 3 |
| 2′-Deoxycoformycin alone | 1 |
| Other regimens | 2 |
| Spleen size | |
| Splenectomized | 98 |
| No splenomegaly | 71 |
| Mild (1-2 fingerbreadths) | 50 |
| Moderate (3-4 fingerbreadths) | 58 |
| Massive (greater than 4 fingerbreadths) | 76 |
| Unknown | 5 |
| Lymphadenopathy | 109 |
| Peripheral blood hematologic parameters | |
| Absolute neutrophil count (×109/L) | |
| Median (range) | 0.9 (0.1-12.5) |
| Hemoglobin level (g/dL) | |
| Median (range) | 11.3 (4.6-16.6) |
| Platelets (×109/L) | |
| Median (range) | 81 (7-575) |
| Peripheral blood immunophenotypic profile | |
| Typical for hairy cell leukemia (CD11c, CD25, and CD103 all positive) | 174 |
| Atypical for hairy cell leukemia (one or more markers negative) | 35 |
| Not done | 149 |
| Bone marrow infiltration by hairy cells (percentage) | |
| Median | 80 |
| Range | 1-100 |
| No. of patients | 358 |
| Prior therapy | |
| None | 179 |
| Splenectomy alone | 44 |
| Interferon alone | 78 |
| Splenectomy, interferon | 47 |
| Splenectomy, interferon, 2′-deoxycoformycin | 4 |
| Interferon, 2′-deoxycoformycin | 3 |
| 2′-Deoxycoformycin alone | 1 |
| Other regimens | 2 |
| Spleen size | |
| Splenectomized | 98 |
| No splenomegaly | 71 |
| Mild (1-2 fingerbreadths) | 50 |
| Moderate (3-4 fingerbreadths) | 58 |
| Massive (greater than 4 fingerbreadths) | 76 |
| Unknown | 5 |
| Lymphadenopathy | 109 |
| Peripheral blood hematologic parameters | |
| Absolute neutrophil count (×109/L) | |
| Median (range) | 0.9 (0.1-12.5) |
| Hemoglobin level (g/dL) | |
| Median (range) | 11.3 (4.6-16.6) |
| Platelets (×109/L) | |
| Median (range) | 81 (7-575) |
| Peripheral blood immunophenotypic profile | |
| Typical for hairy cell leukemia (CD11c, CD25, and CD103 all positive) | 174 |
| Atypical for hairy cell leukemia (one or more markers negative) | 35 |
| Not done | 149 |
| Bone marrow infiltration by hairy cells (percentage) | |
| Median | 80 |
| Range | 1-100 |