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[Assessment of the antitumor effect after remission induction therapy for non-Hodgkin's lymphoma--an approach to a response-adapted therapy].

We assessed the response of various tumors, following each of three consecutive courses of CHOP or CHOP-Bleo therapy in 32 untreated patients with intermediate or high-grade non-Hodgkin's lymphoma (NHL), and also retrospectively compared these results to those for a group in whom complete remission (CR) had been obtained within five courses and a non-CR group. A low CR rate was observed in these patients who showed no or only temporary antitumor effects (persistent increase, no change, or increase after a transient decrease) after two courses of therapy. Furthermore, we measured total tumor volume and tumor regression rate after each course of therapy in 21 patients who had measurable tumors, and determined their cut off values for distinguishing between CR and non-CR. When the cut off values were applied to the effects observed in the 21 patients, positive predictive values after each course of therapy were high. False negative values after the second course of the therapy were low, and showed 0% when the cut off value determined from tumor regression rate was used. These results suggest that we can accurately predict the probability of CR after the second course of CHOP or CHOP-Bleo therapy, although this should be further confirmed by prospective study. In addition, such an analysis may prove useful in setting up individualized response-adapted therapy for NHL.

Adult↗

Intermediate-dose Ara-C/m-AMSA for remission induction and high-dose Ara-C/m-AMSA for intensive consolidation in relapsed and refractory adult acute myelogeneous leukemia.

Thirty-four consecutive patients with either relapsed (n = 28) or primary refractory AML (n = 6) were treated with one or two cycles of intermediate-dose (ID) cytosine arabinoside (Ara-C) (1 g/m2 i.v. q 12 h days 1-6) and amsacrine (m-AMSA) (120 mg/m2 i.v. days 5-7). Patients reaching complete remission (CR) were consolidated with one cycle of Ara-C 3 g/m2 i.v. q 12 h days 1-4 and m-AMSA 120 mg/m2 i.v. day 5. The median duration of the preceding remission was 8 months and median time from last chemotherapy until relapse 3.1 months. Of the relapsed patients, 22/28 (79%) achieved CR regardless of the type of prior intensive maintenance (HD Ara-C/m-AMSA/5-azacytidine) (AZA) or daunorubicin (DNR/CD-Ara-C). Three of the 28 (11%) patients died during hypoplasia; 3/28 (11%) were refractory to 2x ID-Ara-C/m-AMSA. Three of the 28 patients died in CR during hypoplasia after intensive consolidation with HD-Ara-C. Predictive factors for remission were duration of preceding remission and the time from last chemotherapy to relapse. Three patients were transplanted in second CR. One of the six refractory patients reached CR, two remained refractory, and three died during hypoplasia. The median duration of disease-free survival (DFS) of relapsed patients was 3.3 months without further treatment; median survival of responding patients (20 relapsed patients, 1 refractory patient) was 4.5 months, overall survival (n = 29) was 4.8 months. Patients receiving BMT were censored at the time of BMT. Seven patients experienced lung toxicity due to Ara-C, four of whom died.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

Remission induction of ANLL with low dose cytosine arabinoside combined with retinoic acid.

Fourteen cases of acute non-lymphocytic leukemia (ANLL) were treated with low doses of cytosine arabinoside (LDAra-C 20 mg/m/q12h) and etretinate (all-trans-9-3, 7-dimethyl-2, 4, 6, 8 non-atetraenoate, 75 mg/d). Of which 9 were untreated, 3 were in first relapse and 2 were refractory patients. Five of the 9 patients in the first group, and all 3 patients in the second group achieved complete remission (CR). The 2 cases with refractory ANLL showed no response. The CR rates in untreated, first relapse and refractory patients were 55.6%, 100%, and 0% respectively. In all, there was significant reduction of marrow cellularity in 13 patients, 5 of whom developed bone marrow aplasia with predominantly lymphocyte and plasma cells. Only 2 cases with M5 ANLL showed evidence of differentiating into monocytes and neutrophil in hypocellular marrow phase. The efficacy of this drug combination, however, appeared to be achieved through cytotoxicity rather than differentiation. The side effects in the treated cases included cheilitis, dermatitis, fever, petechiae, and impaired liver function, which soon improved upon discontinuation or reduction of dosage. This combination treatment might be most effective in achieving remission among elderly and severely infected patients with ANLL, and could be appropriate even for patients in first relapse.

Adolescent↗

Metastatic Ewing's sarcoma: remission induction and survival.

Eighteen patients with previously untreated metastatic Ewing's sarcoma (ES) entered a protocol designed to evaluate the response rate to cyclophosphamide and doxorubicin induction therapy delivered before delayed surgery and delayed lower dose, limited-field radiation therapy, (RT), and maintenance chemotherapy. With chemotherapy and delayed surgery, 14 of 18 were rendered free of gross tumor. RT was delivered to the primary site of 11 of these responding patients, plus four of those not free of gross disease. Following RT, two more attained complete clinical remission. Site of primary or metastases did not influence outcome; however, the size of the primary at diagnosis did appear to do so. Ten patients remain disease-free 16 to 82 months (median, 47 months) from diagnosis.

Adolescent↗