PubMed Health⌕ Search

Biomedical subjects

R García Delgado

Publications and source records attributed to R García Delgado.

10 recordsLinked to original sources
PubMed1999

[Withdrawal of Pneumocystis carinii pneumonia prophylaxis in patients receiving efficacious combined antiretroviral treatment. Study of 85 cases].

OBJECTIVES: To analyse the incidence of Pneumocystis carinii pneumonia after the withdrawal of prophylaxis, in patients with AIDS who were receiving HAART (highly active antiretroviral treatment). PATIENTS AND METHODS: Prospective opened study of 85 patients with AIDS (CD4 lymphocytes < 200 x 10(6)/l) and whose CD4 counts had increased over 200 x 10(6)/l after HAART, 79 were under primary prophylaxis and six secondary. RESULTS: Mean CD4 lymphocytes count at the time of withdrawal was 343 x 10(6)/l. Mean time of follow-up after withdrawal was 358 days (range: 93-1,487; median: 302). None of the patients have had Pneumocystis carinii or toxoplasmosis after withdrawal of prophylaxis. CONCLUSIONS: Pneumocystis carinii prophylaxis in AIDS patients might be safety withdrawn after effective HAART.

AIDS-Related Opportunistic Infections↗
PubMed1999

[In old age ... AIDS. Is it worth to initiate antiretroviral treatment? Review of 37 patients more than 60 years of age].

INTRODUCTION: HIV infection is common in young persons and its clinical picture, outcome and response to antiretroviral therapy is well known, but it is not the case in the elderly. OBJECTIVES: To evaluate the clinical characteristics and response to antiretroviral therapy of HIV elderly patients. DESIGN: Retrospective study of 37 patients elder than 60 years. The control group comprised of 64 HIV positive patients with less than 60 years. None of them were drug abusers. RESULTS: The mean age of patients was 65 years (range 60-79), 86% were males. The most frequent causes for HIV testing were: wasting (22%), P. carinii pneumonia (19%), tuberculosis (13%) and Kaposi sarcoma (10%), but in the control group voluntary testing was the most common reason (64%). The mean CD4 count at diagnosis was lower in the elderly group (233 cells/microL vs 323 cells/microL). During follow up, the most frequent complications for those with less than 200 CD4 cells were: oral candidiasis (44%), P. carinii pneumonia (27%), Kaposi sarcoma (22%) and esophageal candidiasis (22%), while in the young group P. carinii pneumonia (22%), Kaposi sarcoma (9%) and esophageal candidiasis (9%) were less frequent. 67% of the elderly received antiretroviral therapy. Zidovudine had to be discontinued due to anaemia in half of them. Survival at 6 and 12 months was significantly longer in treated patients compared to those who did not received antiretrovirals (100% vs 14% at 6 months, P < 0.001; and 54% vs 0% at 12 months, p = 0.03); and at 2 years it was almost similar to that of the young group (36% vs 52%, p = 0.38). CONCLUSIONS: HIV infection in the elderly is generally diagnosed in an advance stage, but antiretroviral therapy prolongs survival. Zidovudine should be reserve as a second line drug because its frequent haematological toxicity.

AIDS-Related Opportunistic Infections↗
PubMed1998

Tumor DNA content as a prognostic indicator in squamous cell carcinoma of the oral cavity and tongue base.

BACKGROUND: Nuclear deoxyribonucleic acid (DNA) content is a prognostic factor in several tumors, and decisions regarding treatment have been made using this parameter. Nevertheless, there is no agreement in head and neck cancer. The purpose of the present study was to ascertain whether tumor DNA content correlated with prognosis in cases of primary squamous cell carcinoma (SCC) of the oral cavity and tongue base. METHODS: A retrospective study of formalin-fixed, paraffin-embedded tissue from patients with histologically confirmed SCC of the oral cavity and tongue base was performed using flow cytometry. Tumor DNA content was studied in 109 sets of specimens from previously untreated patients. All of them underwent surgical resection at the University "Hospital de La Princesa" between 1982 and 1992. Clinical parameters (age, sex, site of primary tumor, clinical stage, adjuvant therapy received, and disease-free and overall survival) and histologic parameters (histopathologic stage, tumor differentiation, type of inflammatory infiltration, presence of perineural invasion) were recorded in all cases. An exhaustive statistical analysis was applied. RESULTS: Only the histograms of 93 patients were adequate for consideration. In flow cytometric analysis, DNA aneuploidy was observed in 51 tumors (55%). The proportion of aneuploid tumors was significantly higher in advanced-stage carcinomas (p < .05), tumors with perineural invasion (p < .05) and in men (p < .05). In the 24 patients with lymph node metastasis, the incidence of aneuploidy was 82% (19 of 24) (p < .05). The rate of metastasis and aneuploidy increased as the degree of differentiation decreased (p < .05 for both). Patients with aneuploid carcinomas in both early and advanced stages had shorter relapse-free and overall survival periods than did the patients with diploid tumors (p < .001 for both). A Cox regression analysis demonstrated that ploidy was the single most important prognostic factor in determining relapse and death (p < .001 for both). CONCLUSIONS: The results indicate that tumor DNA analysis by flow cytometry appears to be useful as a supplement to clinical and histologic evaluation in predicting the tendency of SCC of the oral cavity and tongue base to metastasize to regional lymph nodes and to predict the outcome of the disease.

Adult↗
PubMed1996

[Isotypic characterization of IgA paraproteins: association with other clinical and analytic data].

A study was conducted to investigate the relationships between the characteristics of IgA paraprotein and the clinical findings in a group of 196 patients. In 19 cases IgA paraprotein was associated with another monoclonal immunoglobulin (IgG or IgM); the other 177 patients had a single IgA paraprotein; 145 of them corresponded to multiple myeloma (MM) and the other 32 to other diagnostics. Class and type of paraproteins were identified by immunoelectrophoresis and subclass by an enzyme-immunoassay specifically developed for this study. The degree of polymerization of the protein was determined by gel filtration; quantitation of monoclonal IgA and polyclonal IgG and IgM was obtained by kinetic nephelometry. Out of 196 paraproteins, 96.4% were classified in IgA1 subclass and only 3.6% in IgG2. In 14 cases, all of them diagnosed with MM, monoclonal IgA in serum was associated with Bence-Jones protein; in more than 78% of them light chains corresponded to type lambda, whereas type kappa predominated (over 60%) in cases without Bence-Jones protein in serum. Significantly higher serum levels of monoclonal IgA were associated with the diagnosis of myeloma, with type kappa paraproteins, and with the presence of Bence-Jones protein in serum. The cases with two paraproteins (IgA and IgG or IgM) had significantly lower serum levels of IgA, with comparable levels of total paraprotein (the addition of both monoclonal immunoglobulins). Serum levels of polyclonal IgG and IgM, which appeared decreased in cases of MM, were normal in cases with other conditions. In all these cases, monoclonal IgA showed a monomeric character, whereas relevant amounts of polymerized IgA paraprotein was found in almost a third part of myeloma cases, particularly in those with higher serum levels of paraprotein, or when paraprotein belonged to type kappa. The 5 IgA2 paraproteins analyzed had a polymeric character. In conclusion, a detailed, both qualitative and quantitative, analysis of IgA paraproteins can lead to a better knowledge of conditions associated with their presence and at the same time provides useful data for a clinical evaluation of patients.

Humans↗
PubMed1993

[Follicular mantle lymphoma: clinicopathologic and cell proliferation of 11 cases].

BACKGROUND: The aim of the present was to study the biologic behavior of the lymphomas of the follicular mantle by analysis of different indexes of neoplastic cell proliferation and their relation with the clinical symptoms, prognosis and survival of the patients. METHODS: Light microscope, ultrastructural, and frozen and paraffin immunohistochemical studies were performed including the proliferative markers Ki-67 and PC10, flow cytometry and analysis of cell cycle in biopsy samples. Clinical data of 11 patients were collected in addition to therapeutic response and survival. RESULTS: Lymphoma of the follicular mantle is constituted by small sized cell elements with a variable pattern of tumoral growth in the lymph nodes. In normal lymphocytes of the follicular mantle the immunophenotype shows expression of IgM + IgD and a light chain in the cell surface. From a clinical point of view, massive splenomegaly and disseminated stage are the most outstanding characteristics. One third of the cases analyzed presented an aneuploid neoplastic population. According to the PC10 marker, the proliferative index ranged from 2.9 to 14.7% of neoplastic cellularity (mean 7.0). The percentage of cells in the phases S, G2 and M of the cell cycle by flow cytometry varied from 14 to 35 (mean 23%). Neither the cell ploidy nor the tumoral proliferative index were related with the survival of the patients (53 +/- 51 months). CONCLUSIONS: Lymphoma of the follicular mantle is a clinical pathological entity of low biologic aggressivity. Cell aneuploidy or ploidy and the tumoral proliferative index did not establish differences in prognosis or survival in this series.

Adult↗
PubMed1992

[Common variable immunodeficiency and sarcoidosis].

Variable Common Immunodeficiency (VCI) can course with non necrotizing epithelioid granulomatosis of sarcoid type. Although this entity is frequently referred, it is rare and its significance is not clear. The immunological study and response to treatment with corticoids and i.v. immunoglobulins of a patient is who suffered VIC with sarcoid granulomas on lymph node, liver and skin biopsies is here presented. The association between VCI and granulomatosis is discussed.

Adult↗
PubMed1989

[Anti-env and anti-gag antibodies in subjects infected with the human immunodeficiency virus].

Antibodies to antigens codified by the env and gag genes of HIV were separately assayed for in the sera of 150 infected people. From a practical standpoint, enzyme immunoassay was a more convenient and reliable technique than Western blot. Anti-env was positive in 100% and anti-gag in 70% of the cases. A positive anti-env test was confirmatory of serological diagnosis, but lacked any prognostic value. A higher frequency of negative results for anti-gag antibody was significantly associated with the presence of more severe clinical manifestations, more profound impairment of lymphocyte subpopulations (especially CD4 cells), and the finding of HIV antigens in blood. The absence of anti-gag antibodies, which seem to behave as protective, is an unfavorable feature in the clinical and immunological evaluation of patients.

Acquired Immunodeficiency Syndrome↗
PubMed1989

[Levels of blood theophylline in patients with acute bronchospasm].

Plasma theophylline levels (mcg/ml) of 93 patients with a bronchopulmonary disease (asthma and chronic obstructive lung disease) who were on theophylline (normal or retarded) treatment, were determined on admission at the emergency ward because of acute bronchospasm. Our results show that theophylline blood levels were subtherapeutical in patients treated either with normal (2.1 +/- 0.8 mcg/ml) or retarded theophylline (9.6 +/- 1.3 mcg/ml). This was probably due to insufficient dosing and/or poor patient compliance. The necessity of monitoring this type of treatment is once again evident.

Acute Disease↗
PubMedDate not supplied

[Use of aminoglycoside antibiotics in a general hospital: kinetics consequences in those patients whose blood levels are not monitored].

A surprise monitoring of plasma aminoglycoside level was carried out in our Hospital in 55 patients. Basal samples and samples one hour after i.m. or i.v. administration were obtained. A protocol sheet with personal, clinical and therapeutic data was filled for each patient. The FPIA analysis technique (CV less than 5%) was used. Only the data related to gentamicin were evaluated, because the number of patients receiving other aminoglycosides was very low (5 cases). The most usual dose and interval were 80 mg (91%) and 12 hours (69%), respectively. The administration routes were i.v. (52%) and i.m. (48%). Blood urea and/or creatinine levels were not measured in 22% of patients. The baseline gentamicin levels were subtherapeutic in 30%, therapeutical in 57%, and toxic in 13%, and 50%, 46% and 4%, respectively, for the levels after one hour. In patients with abnormal renal function a good correlation could be demonstrated (r = 0.96; p less than 0.001) between creatinine level and gentamicin 1/2 time. This correlation was absent in patients with normal renal function. When the dose of the antibiotic was adjusted to the weight of the patient, the frequency of therapeutic levels was higher (47%; p less than 0.03); in these cases, the most common administration interval was 8 hours (p less than 0.01). We emphasize the lack of control of the renal function in 22% of patients, stressing that the lack of monitoring systematically results in potentially subtherapeutic levels in more than one half of the investigated patients (57%).

Adolescent↗