Acute Lymphoblastic Leukemia Differential Diagnoses
- Author: Karen Seiter, MD; Chief Editor: Emmanuel C Besa, MD more...
Diagnostic Considerations
As noted earlier, patients with acute lymphoblastic leukemia (ALL) may present with fever without any other evidence of infection. In these patients, all fevers must be assumed to be due to infections until proven otherwise. Failure to treat infections promptly and aggressively can be fatal; infections are still the most common cause of death in patients undergoing treatment for ALL.
Other conditions that should be considered in the evaluation of suspected acute lymphoblastic leukemia (ALL) include acute biphenotypic leukemia and natural killer (NK)-cell leukemia.
Differential Diagnoses
- Acute Myelogenous Leukemia
- Lymphoma, B-Cell
- Lymphoma, High-Grade Malignant Immunoblastic
- Lymphoma, Mantle Cell
- Lymphoma, Non-Hodgkin
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| Chromosome Number | 3-Year Event-Free Survival |
| Near tetraploidy | 46-56% |
| Normal karyotype | 34-44% |
| Hyperdiploidy >50 | 32-59% |
| Hyperdiploidy 47-50 | 21-53% |
| Pseudodiploidy | 12-25% |
| Hypodiploidy | 11% |
| Abnormality | Genes Involved | 3-Year Event-Free Survival |
| t(10;14)(q24;q11) | HOX11/TCRA | 75% |
| 6q | Unknown | 47% |
| 14q11 | TCRA/TCRD | 42% |
| 11q23 | MLL | 18-26% |
| 9p | Unknown | 22% |
| 12 | TEL | 20% |
| t(1;19)(q23;p13) | PBX1/E2A | 20% |
| t(8;14)(q24;q32) t(2;8)(p12;q24) t(8;22)(q24;q11) | c-myc/IGH IGK/c-myc c-myc/IGL | 17%* 80%† |
| t(9;22)(q34;q11) | bcr-abl | 5-10%* 66%‡ |
| t(4;11)(q21;q23) | AF4-MLL | 0-10% |
| * Traditional regimens. † Hyper-CVAD (cyclophosphamide, vincristine, doxorubicin [Adriamycin], dexamethasone) with rituxan. ‡ Hyper-CVAD with imatinib. | ||
| ALL Cells | TdT | CD19 | CD10 | CyIg | SIg |
| Early B-precursor ALL | + | + | - | - | - |
| Pre–B-cell ALL (see the image below) | + | + | + | + | - |
| B-cell ALL | - | + | +/- | +/- | + |
| ALL = acute lymphoblastic leukemia; Cylg = Cytoplasmic immunoglobulin; SIg =Surface immunoglobulin; TdT = terminal deoxynucleotidyl transferase. | |||||
| ALL Cells | TdT | Surface CD3 | CD4/CD8 |
| Early T-precursor ALL | + | - | +/+ or -/- |
| T-cell ALL | + | + | +/- or -/+ |

