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Allogeneic BMT for patients with acute myeloid leukemia (AML) is presently a reference therapy. The indications for this therapy mainly rely upon prognostic factors, and their importance is constantly reassessed. To examine the impact of time from diagnosis to transplant on survival and leukemia-free survival (LFS), we analyzed 109 patients from the database of the SFGM comprising patients who had all received an HLA-identical allogeneic BMT for a diagnosis of AML in first complete remission (CR1) between January 1987 and December 1992. All patients were conditioned with cyclophosphamide (CY) and total body irradiation (TBI) (CYTBI), and methotrexate (MTX) + cyclosporin A (CsA) were used as graft-versus-host disease (GVHD) prophylaxis. Patient characteristics were: age = 33 +/- 9, M/F = 64/45, white blood cell count (WBC) at diagnosis = 27 +/- 42 x 10(9)/l, FAB distribution: M1 and M2 = 55; M3 = 15, M4 and M5 = 33, M0, M6 and M7 = 6. Karyotyping was carried out for 64 patients: 32 had a normal karyotype, 16 had good prognosis abnormalities (t(8;21), t(15;17), inv 16) and 16 patients had other abnormalities. Eleven patients needed two courses of induction to achieve CR. Time between diagnosis and BMT was 120 (64-287) days. Forty-nine patients developed grade > or = 2 acute GVHD (actuarial probability = 46%). With a median follow-up of 50 months (27-100), the 5-year probabilities for transplant-related mortality (TRM), relapse, overall survival and LFS are respectively 25%, 26%, 59% and 55%. A multivariate analysis showed that survival is adversely influenced by three independent factors: time to transplant (> 120 days vs 33 vs < or = 33). LFS is only influenced by the first two of these factors. The favorable impact of a shorter time from diagnosis to transplant should lead to performing the transplant as early as possible. Practically speaking, this means that when such therapy is chosen for a patient with CR1 AML, the search for an allogeneic donor should begin immediately and transplant be performed as soon as possible.

The feedback induced chirp in an integrated laser Mach-Zehnder modulator is for the first time monitored by measuring the AM response of the laser and compared to theory. The method simplifies investigation of facet phases effect and allows the comparison between different ILMZ configurations.

We report here the blue light generation in a Nd:Ca4GdO(BO3)3 (Nd:GdCOB) crystal by self-sum frequency mixing. More than 1 mW of cw 465 nm laser emission was achieved with 490 mW of absorbed pump power from a titanium sapphire laser. The blue emission is nearly TEM00, and the laser threshold is very low (a few mW). Up to 100 mW average power was obtained under diode pumping. The performance should be improved by the use of antireflection-coated crystals and suitable mirrors.

Allogeneic BMT for patients with acute myeloid leukemia (AML) is presently a reference therapy. The indications for this therapy may likely rely upon prognostic factors, and their importance are constantly investigated. To examine the impact of time from diagnosis to transplant on survival and Leukemia Free Survival (LFS), we analyzed 109 patients from the data base of the SFGM, patients who all had received an HLA-identical allogeneic BMT for a diagnosis of AML in First Complete Remission (CR1) between January 1987 and December 1992. All patients were prepared with cyclophosphamide (Cy) and Total Body Irradiation (TBI) (Cy — TBI), and Methotrexate (MTX) + Cyclosporine A (CSA) was used as Graft-vs.-Host Disease (GVHD) prophylaxis. Eleven patients needed 2 courses of induction to achieve CR. Time between diagnosis and BMT was 120 (64–287) days. Forty nine patients developed a grade 2 acute GVHD (Actuarial probability = 46%). With a median follow-up of 52 months (30–100), the 5 year probabilities for transplant related mortality (TRM), relapse, overall survival and LFS are respectively 25, 26, 59%, and 55%. A multivariate analysis showed that survival is adversely influenced by 3 independent factors: time to transplant (>120 days vs.≤120 days), acute GVHD (grade 2–4 vs. grade 0–1) and age (>33 vs.≤33). LFS is influenced by only the first two of these factors. The favorable impact of less time from diagnosis to transplant should lead to proceeding to the transplant as soon as possible. Practically speaking, this means that when such therapy is chosen for a patient with CR1 AML, the search for an allogeneic donor should be immediately investigated and transplant performed as soon as possible.