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V Vázquez-Villegas

Publications and source records attributed to V Vázquez-Villegas.

5 recordsLinked to original sources
PubMed1997

[Natural history of paroxysmal nocturnal hemoglobinuria in adolescents,adults, and children: the Mexican experience].

PURPOSE: To compare the clinical patterns and survival of young and adult (AP) versus paediatric (PP) patients with paroxysmal nocturnal haemoglobinuria (PNH). PATIENTS AND METHODS: The clinical records of 117 patients (82% AP, 18% PP) seen in four cities of the Mexican Republic were analysed, the clinical course and survival of both groups being compared. RESULTS: No sex difference was found in the two patient-groups: 51% and 52% males, 49% and 48% females in AP and PP, respectively. The onset of PNH had similar distribution for the two groups of patients: aplastic form, 45% in AP and 62% in PP; cytopenias, 24% in AP versus 27% in PP; haemolysis, 28% in AP and 9% in PP, and thrombosis, 3% in AP versus 0% in PP. The clinical features with significant difference were: anaemic+haemorrhagic syndrome (39 AP (40%) vs 14 PP (67%), p = 0.02), initial diagnosis of immunologic thrombocytopenic purpura (7 AP (7%) vs 7 PP (33%), p = 0.003), and death rate (17 AP (18%) vs 8 PP (38%), p = 0.04). The actuarial survival curves showed significant differences between both groups (p = 0.045, Cox-Mantel), with estimated 10-year survival of 81% for AP and 55% for PP, and 15-year survivals of 64% for AP and 55% for PP. CONCLUSIONS: Seemingly, PNH in paediatric age has poorer prognosis than in adults, which is associated to higher incidence of fatal haemorrhages due to thrombocytopenia.

Acute Disease↗
PubMed1989

Low doses of high-potency antithymocyte globulin (ATG) in severe aplastic anemia: experience with the Mexican ATG.

Twenty patients with severe aplastic anemia (SAA) were treated with low doses (1-5 mg/kg/day) of a high-potency antithymocyte globulin (ATG) produced in Mexico, shown to have at least a 10-fold potency as compared with other globulins of commercial sources. Patients received ATG within a 10-day period, every other day (5 doses) at a dose of 1 mg/kg/day (4 courses), 2 mg/kg/day (12 courses) or 5 mg/kg/day (8 courses). Four patients received 2 consecutive courses of different doses of ATG. A response rate of 42% was recorded in the group, assessed by means of increases in reticulocytes, granulocytes or platelets. One patient showed a complete remission. The 570-day survival of the group was 51%. It is concluded that the domestically produced ATG is useful in the treatment of some patients with SAA in Mexico.

Adolescent↗
PubMedDate not supplied

[Polychemotherapy in multiple myeloma. The COMPA protocol].

Ninety three patients with multiple myeloma (MM) were treated with cyclophosphamide, vincristine, melphalan, prednisone and adriamycin (C.O.M.P.A.). Their median age was 60.9 years and sixty five were males. Seven patients were in stage I-A; 25 in II-A; 33 in III-A and 28 in III-B. Complete remission (CR) was achieved in 61 (65.6%), partial remission (PR) in 18 (19.3%) and no response in 14 (15%). At present, the mean survival of the CR group, is 32.3 months (10 to 78), and of the PR 11.2 months (6 to 18). The actuarial survival of the CR group is 37.9 months. A hemoglobin level lower than 8.5 g/dL, serum creatinine higher than 2.0 mg/dL, and stage III disease were factors that together negatively influenced in both response to treatment and survival. Proteinuria did not affect response, but it was a negative factor for survival. Thirty percent of deaths were due to infection, and 24.5% to myeloma activity associated with infection. We conclude that this five drug combination (C.O.M.P.A.) achieves a high percentage of complete remissions, but does not differ significantly from other reported schemes in the mean survival obtained for multiple myeloma.

Adult↗