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1.
J. bras. nefrol ; 36(4): 476-481, Oct-Dec/2014. tab, graf
Article in Portuguese | LILACS | ID: lil-731152

ABSTRACT

Introdução: Dados nacionais sobre diálise crônica têm tido impacto no planejamento do tratamento. Objetivo: Apresentar dados do inquérito da Sociedade Brasileira de Nefrologia sobre os pacientes com doença renal crônica em tratamento dialítico em julho de 2013 e comparar com dados de 2011- 12. Métodos: Levantamento de dados de unidades de diálise do país. A coleta de dados foi feita utilizando questionário preenchido on-line pelas unidades de diálise. Resultados: Trezentos e trinta e quatro (51%) unidades responderam ao inquérito. Em julho de 2013, o número total estimado de pacientes em diálise foi de 100.397. As estimativas nacionais das taxas de prevalência e de incidência de tratamento dialítico foram de 499 (variação: 284 na região Norte e 622 na Sul) e 170 pacientes por milhão da população, respectivamente. O número estimado de pacientes que iniciaram tratamento em 2013 foi 34.161. A taxa anual de mortalidade bruta foi de 17,9%. Dos pacientes prevalentes, 31,4% tinham idade ≥ 65 anos, 90,8% estavam em hemodiálise e 9,2% em diálise peritoneal, 31.351 (31,2%) estavam em fila de espera para transplante, 30% tinham diabetes, 17% tinham PTH > 600 pg/ml e 23% hemoglobina < 10 g/dl. Cateter venoso era usado como acesso em 15,4% dos pacientes em hemodiálise. Conclusão: O número absoluto de pacientes em diálise tem aumentado 3% ao ano nos últimos 3 anos. As taxas de prevalência e incidência de pacientes em diálise ficaram estáveis, e a taxa de mortalidade tendeu a diminuir em relação a 2012. Houve tendência a melhor controle da anemia e dos níveis de PTH. .


Introduction: National chronic dialysis data have had impact in the treatment planning. Objective: To report data of the annual survey of the Brazilian Society of Nephrology about chronic kidney disease patients on dialysis in July 2013 and compare with 2011-12. Methods: A survey based on data of dialysis units from the whole country. The data collection was performed by using a questionnaire filled out on-line by the dialysis units. Results: Three hundred thirty four (51%) of the dialysis units in the country answered the questionnaire. In July 2013, the total estimated number of patients on dialysis was 100,397. The estimated prevalence and incidence rates of chronic maintenance dialysis were 449 (range: 284 in the North region and 622 in the South) and 170 patients per million population, respectively. The estimated number of new patients starting dialysis in 2013 was 34,161. The annual gross mortality rate was 17.9%. For prevalent patients, 31.4% were aged 65 years or older, 90.8% were on hemodialysis and 9.2% on peritoneal dialysis, 31,351 (31.2%) were on a waiting list of renal transplant, 30% were diabetics, 17% had PTH levels > 600 pg/ml and 23% hemoglobin < 10 g/ dl. A venous catheter was the vascular access for 15.4% of the hemodialysis patients. Conclusion: The absolute number of patients on dialysis has increased 3% per year. The prevalence and incidence rates of patients on dialysis leveled off, while the mortality rate tended to decrease compared with 2012. There was a trend towards a better control of the anemia and PTH levels. .


Subject(s)
Animals , Mice , Cellular Senescence/physiology , /physiology , Lymphoma, B-Cell/etiology , Lymphoma, B-Cell/genetics , /physiology , Ubiquitin-Protein Ligases , Antineoplastic Agents, Alkylating/therapeutic use , Apoptosis/genetics , Apoptosis/physiology , Biomarkers , Cellular Senescence/drug effects , Cellular Senescence/genetics , Cell Survival/drug effects , Cell Survival/genetics , Cell Survival/physiology , /genetics , Cyclophosphamide/therapeutic use , Drug Resistance, Neoplasm/genetics , Drug Resistance, Neoplasm/physiology , Lymphoma, B-Cell/drug therapy , Mice, Knockout , Mice, Mutant Strains , Mutation , Prognosis , Proto-Oncogene Proteins c-cbl , /metabolism , Proto-Oncogene Proteins/genetics , Proto-Oncogene Proteins/metabolism , Tumor Cells, Cultured , /genetics , /physiology , /genetics
3.
Dermatol. argent ; 14(1): 35-45, ene.-mar. 2008. ilus, graf
Article in Spanish | LILACS | ID: lil-558407

ABSTRACT

Antecedentes. Los linfomas B primitivos cutáneos (LBPC) representan un grupo de linfomas cuya clínica, pronóstico y tratamiento difiere de los linfomas nodales. Estos hechos determinaron que, en los últimos cinco años, fueran clasificados como una entidad independiente de ellos.Objetivo. Presentar la experiencia del Servicio de Dermatología del Policlínico Bancario en el diagnóstico, tratamiento y seguimiento de pacientes con linfoma B primitivo cutáneo, en los últimos once años. Diseño. Estudio descriptivo y retrospectivo. Material y métodos. Se incluyeron 22 pacientes en los que se realizó diagnóstico de linfoma de células B primitivo cutáneo durante el período comprendido entre 1995-2006, en el Servicio de Dermatología del Policlínico Bancario.Resultados.La casuística comprende 22 casos, de los cuales 13 correspondieron a linfomas centrofoliculares (59%), 4 fueron linfomas de la zona marginal (18,18%), 2 casos de linfomas de células grandes de la pierna (9,09%) 2 casos de otros linfomas de células grandes (9,09%) y sólo 1 caso de linfoma primitivo cutáneo del manto (4,54%). Conclusiones. En la última clasificación de los LBPC se han considerado los aspectos clínicos, terapéuticos, histopatológicos y genéticos. Este enfoque global optimizó el manejo de esta patología por parte del dermatólogo y realza su importancia dentro del grupo interdisciplinario encargado de su seguimiento. De todas formas, debe considerarse que existe una continua revisión que podría producir nuevas modificaciones en un futuro no muy lejano.


Subject(s)
Humans , Male , Female , Lymphoma, B-Cell/classification , Lymphoma, B-Cell/genetics , Skin Neoplasms/genetics , Skin Neoplasms/pathology , Skin Neoplasms/therapy , Immunohistochemistry
4.
Rev. chil. enferm. respir ; 22(2): 108-116, jun. 2006. ilus, tab
Article in Spanish | LILACS | ID: lil-436524

ABSTRACT

The present review describes the current classification of the pulmonary lymphoproliferative lesions as proposed by the WHO in 2004 with emphasis in the clinical picture and histopathological features. The definition of these entities includes the clinical picture, histopathology, immunohistochemistry and molecular features. The differential diagnosis of the most important entities is also briefly discussed


En el presente trabajo de revisión se describe la clasificación actual de las lesiones linfoproliferativas del pulmón propuesta por la OMS el año 2004 con énfasis en el cuadro clínico y los aspectos histopatológicos. La definición de estas entidades incluye cuadro clínico, histopatología, inmunohistoquímica y características moleculares. Se discute brevemente el diagnóstico diferencial de las formas más importantes


Subject(s)
Humans , Lung Diseases , Lung Neoplasms , Lymphoproliferative Disorders/classification , Diagnosis, Differential , Lymphomatoid Granulomatosis/genetics , Lymphomatoid Granulomatosis/immunology , Lymphomatoid Granulomatosis/pathology , Lymphoma, B-Cell/genetics , Lymphoma, B-Cell/immunology , Lymphoma, B-Cell/pathology , Lymphoma, B-Cell, Marginal Zone/genetics , Lymphoma, B-Cell, Marginal Zone/immunology , Lymphoma, B-Cell, Marginal Zone/pathology
5.
The Korean Journal of Gastroenterology ; : 205-212, 2006.
Article in Korean | WPRIM | ID: wpr-85280

ABSTRACT

BACKGROUND/AIMS: Microsatellite instability (MSI) reflects the defect in DNA mismatch repair (MMR) pathways and plays an important role in certain malignancies. However, the role of MSI in the development of gastric B-cell lymphomas remains unsettled. We aimed to investigate the clinical significance of MSI in patients with gastric B-cell lymphoma. METHODS: Seven micosatellite loci (BAT25, BAT26, D2S123, D5S346, D17S250, D14S50, IGF-IIR) were used for MSI analyses. Microsatellite genotypes were categorized as microsatellite stable (MSS, no positive marker), low frequency MSI (MSI-L, 40% positive marker). Among the gastric B-cell lymphoma patients who underwent MSI analysis between September 2002 and May 2003, twenty-two patients were enrolled. Median follow-up duration was 23 months (6-32 months). RESULTS: Median age was 46 years (26-73 years). Male to female ratio was 1:1.4. Twelve patients (54.5%) underwent Helicobacter pylori (H. pylori) eradication and ten patients (45.5%) underwent chemoradiation therapy. No case presented MSI-H. MSI-L was observed in 40.9% (9/22). Between MSS group and MSI-L group, there was no significant difference in age, tumor stage, location, grade of large cell component, H. pylori infection, bulk of tumor and proportion of regression or recurrence. All positive markers belonged to the dinucleotide markers. CONCLUSIONS: The current study suggests that the role of MSI is questionable in the development of gastric B-cell lymphoma due to their low incidence.


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Helicobacter Infections/genetics , Helicobacter pylori , Lymphoma, B-Cell/genetics , Microsatellite Repeats/genetics , Stomach Neoplasms/genetics
6.
Journal of Korean Medical Science ; : 645-651, 2006.
Article in English | WPRIM | ID: wpr-191667

ABSTRACT

The metastasis-suppressing role of the nm23 gene in the metastatic spread of malignant tumor is still debated. We examined the nm23-H1 protein expression and gene mutation in non-Hodgkin's lymphomas to compare with the clinicopathologic parameters. The expression of nm23-H1 protein was immunohistochemically examined in 150 cases of non-Hodgkin's lymphomas; 85 diffuse large B cell lymphomas (DL-BCL), 18 marginal zone B cell lymphomas (MZL), 3 mantle cell lymphomas, 25 peripheral T cell lymphomas, not otherwise specified (TCLNOS), and 19 NK/T cell lymphomas (NK/T). Eighty-one cases (58 DLBCL, 6 MZL, 4 TCLNOS, and 13 NK/T) were studied for nm23-H1 gene mutation in exon 1 to 5. The high expression of nm23-H1 protein was associated with the high IPI score (p=0.019) and the low survival rate of the patients (p=0.0039). The gene mutation of nm23-H1 was detected in 10.3% of DLBCL and 30.7% of NK/T; but none in MZL and TCLNOS. The mutation was found in exon 1 in 5 cases, exon 2 in two cases, exon 4 in one case and both exon 1 and 2 in two cases. Our results suggest that the expression of nm23-H1 protein can be used as a poor prognostic marker in non-Hodgkin's lymphomas, and the mutational change of gene may operate in the lymphomagenesis.


Subject(s)
Middle Aged , Male , Humans , Female , Tissue Array Analysis , Survival Analysis , Prognosis , Polymorphism, Single-Stranded Conformational , Nucleoside-Diphosphate Kinase/genetics , Mutation/genetics , Lymphoma, T-Cell/genetics , Lymphoma, Non-Hodgkin/genetics , Lymphoma, Mantle-Cell/genetics , Lymphoma, Large B-Cell, Diffuse/genetics , Lymphoma, B-Cell/genetics , Immunohistochemistry , DNA Mutational Analysis , Base Sequence
7.
Medicina (B.Aires) ; 65(2): 143-146, 2005. tab, graf
Article in Spanish | LILACS | ID: lil-425489

ABSTRACT

Los telómeros son estructuras esenciales para el mantenimiento de la integridad cromosómica y la capacidad replicativa de la célula. La reducción de la longitud telomérica (LT) aumenta la probabilidad de producir errores capaces de generar cambios genómicos importantes para el desarrollo neoplásico, determinando desbalances de material genético. En este trabajo se evaluó la LT mediante el análisis de fragmentos de restricción terminal (TRF) en médula ósea y/o biopsia ganglionar de 36 pacientes (edad media: 54.2 años; rango 29-77 años; 21 varones): 29 con linfoma folicular (LF) al diagnóstico y 7 con linfoma B difuso a células grandes secundario a LF (LBDCG-S). Se efectuó el análisis del rearreglo molecular del gen BCL-2 por PCR anidada y de larga distancia. Las medias de TRF en LF (4.18±0.18 Kb) y LBDCG-S (3.31±0.25 Kb) resultaron significativamente menores que en controles (8.50±0.50 Kb) (p<0.001), encontrándose diferencias entre ambos subtipos histológicos (p=0.036). Las muestras negativas para el rearreglo BCL-2 mostraron LT menores (3.39±0.30 Kb) que las positivas (4.25±0.19 Kb) (p=0.023), observándose una tendencia a valores menores en pacientes negativos para el rearreglo BCL-2, intermedios en positivos para mcr, minor cluster region, (3.84±0.45 Kb) y mayores en los positivos para MBR, Major Breakpoint Region, (4.35±0.21 Kb). Nuestros resultados muestran una reducción de la LT en LF y LBDCG-S, con TRFs significativamente más cortos en estos últimos, sugiriendo la participación del acortamiento telomérico em la progresión tumoral. Asimismo, las diferencias detectadas entre los casos BCL-2 positivos y negativos sustentarían la presencia de diferentes mecanismos patogénicos propuestos para estos distintos LF.


Subject(s)
Adult , Middle Aged , Humans , Male , Female , Lymphoma, Large B-Cell, Diffuse , Lymphoma, B-Cell/genetics , Lymphoma, Follicular/genetics , Telomere/physiology , Bone Marrow/pathology , Ganglia/pathology , /genetics , Telomere/genetics
8.
Rev. bras. cancerol ; 47(3): 291-301, jul.-set. 2001. ilus
Article in Portuguese | LILACS | ID: lil-359098

ABSTRACT

Os linfomas não Hodgkin de origem B na infância são neoplasias de alto grau de malignidade, predominando os linfomas do tipo Burkitt e não Burkitt. O linfoma de Burkitt apresenta dois subtipos, o endêmico e o esporádico, ambos caracterizados por translocações cromossômicas envolvendo o proto-oncogene c-myc que resultam na perda de regulação desse gene. Embora a função normal do c-myc permaneça enigmática, recentes dados indicam que esse gene desempenha um papel importante em diversos aspectos da biologia celular, incluindo proliferação, diferenciação, metabolismo e apoptose. Nesta revisão são abordados os aspectos epidemiológicos, clínicos e moleculares dos linfomas B da infância e o papel da ativação do gene c-myc associado a mutações dos genes p53 e Rb na patogênese dos linfomas de Burkitt. O papel da infecção pelo vírus Epstein-Barr (EBV), sua relevância na indução da carcinogenese e interação das proteínas virais com proteínas dos genes supressores de tumor é também discutido.


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Burkitt Lymphoma , Lymphoma, Non-Hodgkin/genetics , Lymphoma, B-Cell/genetics , Lymphoma, B-Cell/pathology , Molecular Biology
9.
Arch. argent. dermatol ; 48(2): 57-61, mar.-abr. 1998. ilus
Article in Spanish | LILACS | ID: lil-216218

ABSTRACT

El diagnóstico de los linfomas cutáneos tiene importantes implicancias para los pacientes. Tradicionalmente el diagnóstico de cualquier lesión cutánea está basado en criterios clínicos e histopatológicos. Ninguno de estos criterios es absoluto y en los últimos años se ha destacado la trascendencia de la inmunohistoquímica y la biología molecular en relación con el diagnóstico y pronóstico. La inmunohistoquímica permite definir subpoblaciones de linfocitos, estableciendo el fenotipo, categorizando algunos cuadros y destacando en algunos casos el pronóstico a partir del CD30 (+) o (-). La biología molecular define el genotipo, aportando el concepto de monoclonalidad que sugiere malignidad. Por otra parte, proponemos una clasificación de los linfomas cutáneos primarios que ha sido recientemente introducida


Subject(s)
Humans , Immunohistochemistry/standards , Lymphoma, B-Cell/diagnosis , Lymphoma, T-Cell, Cutaneous/diagnosis , Diagnosis, Differential , Gene Rearrangement, delta-Chain T-Cell Antigen Receptor/immunology , Lymphoma, B-Cell/classification , Lymphoma, B-Cell/genetics , Lymphoma, T-Cell, Cutaneous/classification , Lymphoma, T-Cell, Cutaneous/genetics , Molecular Biology/trends , Polymerase Chain Reaction/trends
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