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1.
Indian Pediatr ; 61(5): 475-481, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38517005

RESUMO

Over the years, survival of children with chronic diseases has significantly improved and a large proportion of them now are entering into adulthood. Transition of Care (ToC) of such patients with having childhood onset of chronic diseases to the adult health care system is well organized in developed countries, although it is an emerging concept in India. In situations where the systems for ToC are not in place, such cases are fraught with unsatisfactory health outcomes. With proper ToC in place, these patients are likely to receive uninterrupted care by the adult care physicians and hence reach their full potential. This document highlights the need, rationale and way forward for ToC of youth with special health care needs (YSHCN) across the country. It also describes the standard operating procedures to develop the ToC at a hospital level for clinicians and administrators.


Assuntos
Transição para Assistência do Adulto , Humanos , Índia , Adolescente , Transição para Assistência do Adulto/organização & administração , Transição para Assistência do Adulto/normas , Criança , Pediatria/organização & administração , Pediatria/normas , Doença Crônica/terapia , Necessidades e Demandas de Serviços de Saúde
3.
Indian Pediatr ; 60(8): 644-647, 2023 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-37563885

RESUMO

OBJECTIVE: To study the clinico-hematological profile, complications, and management of children with non-transfusion dependent thalassemia (NTDT) in northern India. METHOD: We retrieved and analyzed the data of 69 children with NTDT diagnosed between January, 2006 to December, 2018, aged under 18 years from our unit's records. RESULTS: The participants mean (SD) age was 4.4 (3.1) years, and they presented with anemia (29%), jaundice (13%), hemolytic facies (13%), splenomegaly (87%), thromboembolism (2.9%) and pathological short stature (28.5%). The most common cause of NTDT was b-thalassemia (45%), followed by either compound-heterozygous or homozygous for Eb-thalassemia mutation. The most frequent single genotype observed was compound heterozygous for IVS1-5 (G>C) and codon 26 (G>A). The mean (SD) follow-up duration was 3.5 (2.4) years. On follow-up, 27 children (%) remained transfusion free, and 30 (%) needed occasional transfusions. 63% of patients initially presenting with pathological short stature showed improvement in growth. Amongst children older than 10 years (n=20), subclinical hypothyroidism was detected in 6 children and impaired glucose tolerance test in 1 child. CONCLUSION: Eß-thalassemia was the commonest cause of NTDT in this population.


Assuntos
Talassemia , Humanos , Criança , Adolescente , Idoso , Pré-Escolar , Talassemia/epidemiologia , Talassemia/terapia , Talassemia/complicações , Transfusão de Sangue , Genótipo , Homozigoto , Índia/epidemiologia
4.
J Pediatr Hematol Oncol ; 45(7): e885-e891, 2023 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-37526372

RESUMO

OBJECTIVES: The objectives of this study were to study the spectrum of neurologic complications in children with lymphoreticular malignancy (acute lymphoblastic leukemia, Hodgkin, and non-Hodgkin lymphoma) at diagnosis and during treatment and to determine the etiology of these complications. MATERIALS AND METHODS: In this descriptive cohort study, conducted between November 2018 and March 2020, 204 children with a diagnosis of lymphoreticular malignancy were enrolled. The baseline investigations were done in all the cases. Those who developed neurological symptoms were evaluated with cerebrospinal fluid examination and radiologic and electrophysiologic studies as per indication and were managed according to standard management guidelines. RESULTS: Of the 204 patients, 30 (14.7%) developed neurological complications. The majority of these complications (n=20/30; 87%) occurred during the intensive chemotherapy period. Common complications included acute methotrexate neurotoxicity (n=7), vincristine-induced neurotoxicity (n=7), central nervous system (CNS) relapse (n=4), and posterior reversible encephalopathy syndrome (n=2). L-asparaginase-induced thrombosis (n=1), intramedullary compression syndrome (n=1), CNS infection (n=2), CNS hemophagocytic lymphohistiocytosis (n=1), and steroid-induced myopathy (n=1) were also observed. The complications resolved in 21/30 (70%) patients after receiving appropriate treatment while the neurological complication persisted in 2/30 (6.7%) patients. Three patients (10%) abandoned the treatment, and 4 (13.3%) patients expired. CONCLUSIONS: Neurologic complications in patients with lymphoreticular malignancy are quite variable, having common presenting symptoms but varying imaging abnormalities. By close follow-up and effective treatment, the morbidity and mortality of these complications can be minimized.


Assuntos
Síndrome da Leucoencefalopatia Posterior , Leucemia-Linfoma Linfoblástico de Células Precursoras , Criança , Humanos , Estudos de Coortes , Síndrome da Leucoencefalopatia Posterior/etiologia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Leucemia-Linfoma Linfoblástico de Células Precursoras/complicações , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/patologia , Asparaginase
5.
Indian J Pediatr ; 90(11): 1123-1126, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37592099
7.
Indian J Pediatr ; 90(12): 1227-1231, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37133752

RESUMO

Thalassemia is one of the most common hemoglobinopathies affecting a large number of people in India and other countries of South-East Asia. For patients with most severe form of the disease- Transfusion Dependent Thalassemia (TDT), stem cell transplantation or gene therapy are only curative treatment which are not available to most of the patients because of lack of experts, financial constraints and lack of suitable donors. In such situations, most cases are managed with regular blood transfusion and iron chelation therapy. With this treatment, over the years, survival of the patients has improved and 20-40% cases are entering into adulthood. In the absence of structured transition of care programs, currently most adult TDT patients are being managed by pediatricians. This article highlights the need for transition of care for TDT patients, barriers to transition and how to overcome the barriers and process of transition of care to adult care team. The importance of empowering the patients in self-management of the disease and educating the adult care team to achieve the desired outcome of transition program is highlighted.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Talassemia , Talassemia beta , Adulto , Humanos , Talassemia beta/terapia , Terapia por Quelação , Transferência de Pacientes , Transplante de Células-Tronco , Talassemia/terapia , Transição para Assistência do Adulto
8.
Indian J Pediatr ; 90(12): 1177-1181, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36763251

RESUMO

OBJECTIVE: To study the serum calprotectin levels in children with juvenile idiopathic arthritis (JIA) and correlate it with C-reactive protein (CRP) and the Juvenile Arthritis Disease Activity Score-27 (JADAS-27). METHODS: This was a cross-sectional observational study done between November 2017 and March 2019. Fifty treatment-naive children, aged 1 to 18 y with the diagnosis of JIA as per the International League of Associations of Rheumatology (ILAR) criteria were enrolled. Assessment of disease activity was done according to the Juvenile Arthritis Disease Activity Score (JADAS-27). Determination of serum calprotectin and CRP levels was done by immunoassay. The correlation between calprotectin levels with CRP and JADAS-27 was calculated. RESULTS: Of the 50 patients with JIA included in the study, there were 18 female and 32 male children. The median age of presentation to the hospital was 9 y (IQR 5.82-13). The median JADAS-27 was 14 (IQR 6, 20.25). The median serum calprotectin level was 45,375 ng/mL (IQR 30,725, 52,270; range 8,560-63,160 ng/mL). The median CRP was 35.4 mg/L (IQR 3.48, 80.3; range 0.02 and 107.4 mg/L). The levels of calprotectin in different JIA subtypes were not statistically different using Kruskal-Wallis test. The study also demonstrated a positive correlation between serum calprotectin with CRP and the JADAS-27 (r = 0.418). CONCLUSION: The calprotectin levels in JIA were significantly higher than those reported in the literature irrespective of the subtype. Serum calprotectin positively correlated with CRP and JADAS-27 in children with JIA.


Assuntos
Artrite Juvenil , Criança , Humanos , Masculino , Feminino , Artrite Juvenil/diagnóstico , Estudos Transversais , Proteína C-Reativa/análise
9.
Indian J Pathol Microbiol ; 66(1): 81-84, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36656215

RESUMO

Background: Ineffective erythropoiesis is a predominant feature in ß-thalassemia major (ß-TM), causing marked erythroid expansion leading to highly raised levels of growth differentiation factor-15 (GDF-15), which, in turn, suppresses hepcidin production in liver resulting in increased iron absorption from gut. We aim to study the serum GDF-15 in polytransfused ß-TM patients and its correlation with serum ferritin and serum hepcidin. Method: Thirty-nine polytransfused ß-TM children aged between 5 and 17 years and 33 age- and gender-matched healthy controls were enrolled in the study. Complete blood count, serum GDF-15, serum ferritin, and serum hepcidin were performed. Results: The mean serum GDF-15, serum hepcidin, and serum ferritin levels were 638.65 ± 306.96 pg/ml, 108.21 ± 191.30 ng/ml, and 2274.60 ± 1216.08 ng/ml, respectively, which were significantly higher than control group (P < 0.001, P = 0.003, P < 0.001, respectively). There was significant positive correlation of GDF-15 with blood transfusions (r = 0.415, P = 0.009), positive correlation with serum ferritin (r = 0.653, P = 0), and significant negative correlation with serum hepcidin (r = -0.508, P = 0.001). Conclusion: The findings of the present study suggest that GDF-15 is an important regulator of hepcidin in ß-TM patients. GDF-15 and serum hepcidin together can be used to monitor iron overload and its related complications in such patients.


Assuntos
Sobrecarga de Ferro , Talassemia beta , Adolescente , Criança , Pré-Escolar , Humanos , Talassemia beta/terapia , Ferritinas , Fator 15 de Diferenciação de Crescimento , Hepcidinas , Sobrecarga de Ferro/etiologia
10.
Pediatr Blood Cancer ; 70(2): e30091, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36411263

RESUMO

INTRODUCTION: The InPOG-HL-15-01, a multicentric prospective study, used a risk-stratified and response-based approach with doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD) backbone to treat children and adolescents with newly diagnosed Hodgkin lymphoma (HL) and reduce the use of radiation therapy (RT). Children/adolescents with bulky disease or inadequate response at early response assessment (ERA) after two cycles of chemotherapy were assigned to receive RT. For ERA, positron emission tomography computed tomography (PET-CT) was recommended but not mandatory in view of limited access. This study aimed to compare the impact of using contrast-enhanced computed tomography (CECT) and PET-CT on treatment decisions and outcomes. METHODOLOGY: 396 patients were enrolled and 382 had an ERA at the assigned time point. Satisfactory response was defined as Deauville score 3 or less for patients undergoing PET-CT and complete response (CR)/very good partial response (VGPR) for patients undergoing CECT. Outcomes of interest incorporate 5 year event-free survival (EFS), EFS including abandonment (EFSa), and overall survival (OS). RESULTS: At ERA, satisfactory response was documented in 277 out of 382 (72.5%) participants and this was significantly higher in PET-CT (151 out of 186, 81.2%) as compared with CECT-based assessments (126 out of 196, 64.3%) respectively (p value < .001). Amongst the 203 patients with nonbulky disease (wherein the indication for RT was entirely dependent on ERA), 96 out of 114 (84.2%) and 61 out of 89 (68.5%) patients achieved a satisfactory response according to the PET-CT and CECT (p value = .008) respectively and hence a lesser proportion of patients in the PET-CT arm received RT. Despite a lower usage of RT the 5 year OS of both groups, ERA based on CECT (91.8%) versus PET-CT (94.1%) was comparable (p value = .391) and so was the 5 year EFS (86.7 vs. 85.5%, p value = .724). CONCLUSION: Use of PET-CT as the modality for ERA is more likely to indicate a satisfactory response as compared with CECT and thereby decreases the need for RT in response-based treatment algorithm for HL-afflicted children. The reduction in the application of RT did not impact the overall outcome and plausibly would lower the risk of delayed toxic effects.


Assuntos
Doença de Hodgkin , Criança , Adolescente , Humanos , Doença de Hodgkin/diagnóstico por imagem , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/radioterapia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Dacarbazina/uso terapêutico , Vimblastina/uso terapêutico , Bleomicina/efeitos adversos , Doxorrubicina/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Estudos Prospectivos , Países em Desenvolvimento , Tomografia por Emissão de Pósitrons , Estadiamento de Neoplasias
11.
Indian J Pediatr ; 90(8): 761-765, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-35737182

RESUMO

OBJECTIVE: To evaluate the proportion of patients who received empirical treatment with antitubercular therapy (ATT) prior to the diagnosis of Hodgkin lymphoma (HL) in the first multicentric, prospective study on HL from India, and to assess its impact on extent of disease at diagnosis and outcomes. METHODS: Children < 18 y with biopsy proven HL were enrolled in InPOG-HL-15-01. Along with other clinical and epidemiological data, history of prior treatment with ATT was documented. All patients received treatment as per a risk-stratified, response-adapted strategy. RESULTS: Out of 396, 115 (29%) children had received ATT prior to establishing a definitive diagnosis of HL. This cohort presented with advanced-stage disease (p = 0.001) and B symptoms (p = 0.001) in a higher proportion of cases. Consequently, those children were more likely to receive 6 rather than 4 cycles of chemotherapy (p = 0.001). They were more likely to have infradiaphragmatic involvement (p = 0.001). Overall survival and event-free survival were not different. CONCLUSION: Empirical treatment with ATT in children presenting with lymphadenopathy continues to be practiced widely in India. The delay in diagnosis may contribute to children presenting with advanced-stage disease warranting more intensive treatment for successful outcomes.


Assuntos
Doença de Hodgkin , Linfadenopatia , Criança , Humanos , Estudos Prospectivos , Doença de Hodgkin/diagnóstico , Doença de Hodgkin/tratamento farmacológico , Antituberculosos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Linfadenopatia/tratamento farmacológico
12.
Indian J Pediatr ; 90(1): 9-15, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-35113365

RESUMO

OBJECTIVES: To carry out an active surveillance for adverse drug reactions (ADRs) in children with HIV infection newly initiated on antiretroviral therapy (ART), determine risk factors for their occurrence, and assess their influence on adherence to ART. METHODS: All children newly initiated on ART from 1st March 2014 to 30th June 2019 at a tertiary care children's hospital in New Delhi, were actively monitored for ADRs to ART for a period of 6 mo after ART initiation. The frequency, spectrum, and severity of ADRs, their influence on adherence, and risk factors for their occurrence were analyzed. RESULTS: Among the 174 enrolled children, ADRs were observed in 78 (44.8%) children during the first 6 mo after ART initiation. Total numbers of episodes of ADR observed were 108 (0.62 episodes of ADR/child). Sixty percent of events were of grade 1 severity, 19.4% events were of grade 2 and 3 each, while 1 (0.9%) event was of grade 4 severity. Adherence to ART was adversely affected in 21.8% of ADRs. Gastrointestinal symptoms (49.1%) were most frequent among all the events observed. Zidovudine, lopinavir/ritonavir, efavirenz and nevirapine based regimes were significantly associated with hematological, gastrointestinal, neurological, and dermatological ADRs, respectively. Children with immunological suppression were at a higher risk of developing ADRs as compared to those without it [RR 1.9 (95% CI (1.1-3.2)]. CONCLUSIONS: ADRs to ART are very frequent; most of them are mild and self-limiting. However, they can adversely impact adherence to ART. Anticipatory guidance, ongoing monitoring, and provision of symptomatic treatment will help tide over most ADRs and reduce their adverse impact upon ART adherence.


Assuntos
Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Infecções por HIV , Criança , Humanos , Infecções por HIV/complicações , Estudos de Coortes , Fatores de Risco , Estudos Longitudinais , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/epidemiologia
13.
Indian Pediatr ; 59(12): 929-932, 2022 12 15.
Artigo em Inglês | MEDLINE | ID: mdl-36511206

RESUMO

OBJECTIVES: We investigated the correlation of transient elastography (TE) with MRI R2* values and serum ferritin in patients with transfusion-dependent thalassemia (TDT). METHODS: We reviewed hospital records of 59 patients with TDT aged ³8 years without any evidence of chronic liver disease and who had fibroscan within 3 months of MRI T2*, who seen at our center between January, 2014 and December, 2019. Spearman correlation and linear regression analysis were used to evaluate the correlation between TE liver stiffness measurements and R2* MRI values and with serum ferritin. RESULTS: Mean (SD) age of the subjects was 13.0 (3.1) years and body mass index was 16.6 (2.3) kg/m2. Mean liver stiffness measurement, MRI T2*(3T), corresponding MRI R2*(3T), and ferritin values were 6.55 (3.10) kPa, 3.4 (4.6) milliseconds, 616.20 (383.9) Hz, and 2874.69 (1570.7) ng/mL, respectively. TE measurements correlated with MRI R2* values (r=0.61; P=0.001) and with serum ferritin level (r=0.59, P=0.001). CONCLUSION: TE is a reliable tool to estimate hepatic iron overload in patients with TDT.


Assuntos
Sobrecarga de Ferro , Talassemia , Talassemia beta , Criança , Humanos , Ferritinas , Sobrecarga de Ferro/diagnóstico por imagem , Fígado/diagnóstico por imagem , Imageamento por Ressonância Magnética , Talassemia/diagnóstico por imagem , Talassemia/terapia
14.
Indian Pediatr ; 59(10): 782-801, 2022 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-36263494

RESUMO

JUSTIFICATION: Anemia in children is a significant public health problem in our country. Comprehensive National Nutrition Survey 2016-18 provides evidence that more than 50% of childhood anemia is due to an underlying nutritional deficiency. The National Family Health Survey-5 has reported an increase in the prevalence of anemia in the under-five age group from 59% to 67.1% over the last 5 years. Clearly, the existing public health programs to decrease the prevalence of anemia have not shown the desired results. Hence, there is a need to develop nationally acceptable guidelines for the diagnosis, treatment and prevention of nutritional anemia. OBJECTIVE: To review the available literature and collate evidence-based observations to formulate guidelines for diagnosis, treatment and prevention of nutritional anemia in children. PROCESS: These guidelines have been developed by the experts from the Pediatric Hematology-Oncology Chapter and the Pediatric and Adolescent Nutrition (PAN) Society of the Indian Academy of Pediatrics (IAP). Key areas were identified as: epidemiology, nomenclature and definitions, etiology and diagnosis of iron deficiency anemia (IDA), treatment of IDA, etiology and diagnosis of vitamin B12 and/or folic acid deficiency, treatment of vitamin B12 and/or folic acid deficiency anemia and prevention of nutritional anemia. Each of these key areas were reviewed by at least 2 to 3 experts. Four virtual meetings were held in November, 2021 and all the key issues were deliberated upon. Based on review and inputs received during meetings, draft recommendations were prepared. After this, a writing group was constituted which prepared the draft guidelines. The draft was circulated and approved by all the expert group members. RECOMMENDATIONS: We recommend use of World Health Organization (WHO) cut-off hemoglobin levels to define anemia in children and adolescents. Most cases suspected to have IDA can be started on treatment based on a compatible history, physical examination and hemogram report. Serum ferritin assay is recommended for the confirmation of the diagnosis of IDA. Most cases of IDA can be managed with oral iron therapy using 2-3 mg/kg elemental iron daily. The presence of macro-ovalocytes and hypersegmented neutrophils, along with an elevated mean corpuscular volume (MCV), should raise the suspicion of underlying vitamin B12 (cobalamin) or folic acid deficiency. Estimation of serum vitamin B12 and folate level are advisable in children with macrocytic anemia prior to starting treatment. When serum vitamin B12 and folate levels are unavailable, patients should be treated using both drugs. Vitamin B12 should preferably be started 10-14 days ahead of oral folic acid to avoid precipitating neurological symptoms. Children with macrocytic anemia in whom a quick response to treatment is required, such as those with pancytopenia, severe anemia, developmental delay and infantile tremor syndrome, should be managed using parenteral vitamin B12. Children with vitamin B12 deficiency having mild or moderate anemia may be managed using oral vitamin B12 preparations. After completing therapy for nutritional anemia, all infants and children should be advised to continue prophylactic iron-folic acid (IFA) supplementation as prescribed under Anemia Mukt Bharat guidelines. For prevention of anemia, in addition to age-appropriate IFA prophylaxis, routine screening of infants for anemia at 9 months during immunization visit is recommended.


Assuntos
Anemia Ferropriva , Anemia Macrocítica , Anemia , Deficiência de Ácido Fólico , Hematologia , Deficiência de Vitamina B 12 , Lactente , Adolescente , Humanos , Criança , Pré-Escolar , Deficiência de Ácido Fólico/complicações , Deficiência de Ácido Fólico/epidemiologia , Deficiência de Vitamina B 12/diagnóstico , Deficiência de Vitamina B 12/epidemiologia , Anemia/diagnóstico , Anemia/epidemiologia , Anemia/etiologia , Vitamina B 12 , Anemia Ferropriva/complicações , Ácido Fólico/uso terapêutico , Ferro/uso terapêutico , Anemia Macrocítica/complicações , Hemoglobinas/análise , Ferritinas
15.
J Paediatr Child Health ; 58(10): 1760-1765, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35789061

RESUMO

AIM: COVID-19 has presented an unprecedented challenge to health services and has significantly affected the management of non-Covid illnesses, like thalassemia. The present study documents the impact of Covid-associated restrictions and disruptions on working of the pediatric thalassemia day care centre (TDCC), and measures taken by TDCC and blood transfusion services to adapt to and mitigate the negative impact of Covid pandemic and associated lockdown on patient care. METHODS: Pre-transfusion haemoglobin and packed cell transfusion requirement were compared across three time periods, namely pre-lockdown, lockdown and post-lockdown in paediatric transfusion-dependent thalassaemia (TDT) patients. Caregivers were interviewed to document any problems faced by them. RESULTS: The study involved 181 TDT patients. There was a significant reduction in mean pre-transfusion haemoglobin and red cells transfused during lockdown phase as compared to pre-lockdown phase. Regular care was interrupted in 45% of patients and 76% of patients getting blood from outside could not get leukoreduced red cells. Investigations, monitoring and continuity of iron chelation were also affected. Blood centre faced 30.5% reduction in blood supply during lockdown. TDCC and blood centre took several steps, including prolongation of service hours and staggering of transfusions to ensure maximum transfusions while ensuring social distancing. CONCLUSION: The COVID-19 pandemic imposed many unprecedented challenges to the routine care of thalassaemic patients; however, some of them could be dealt with by a proactive approach and micro-planning at the institution level. Other similar resource-limited settings could learn from experiences for continued quality care for chronic medical conditions during pandemic like situations.


Assuntos
COVID-19 , Talassemia , Transfusão de Sangue , COVID-19/epidemiologia , Criança , Controle de Doenças Transmissíveis , Humanos , Quelantes de Ferro , Pandemias , Talassemia/complicações , Talassemia/epidemiologia , Talassemia/terapia
17.
J Phys Condens Matter ; 34(31)2022 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-35640573

RESUMO

We report the experimental evidence of physical aging and rejuvenation in the vortex matter of a conventional low-TCsuperconducting Nb50Zr50alloy. The underlying naturally formed microstructure indicates a landscape of pinning potential for the flux lines, on the basis of which the pinning properties are explained. Magnetic relaxation measurements were used to construct the two-time auto correlation function which is a function of the measuring time 't' and waiting time 'tw' after the vortex state is prepared. The main characteristic features of the phenomenon of physical aging, which are the breaking of time-translation invariance and dynamical scaling are seen. Successive aging of the vortex matter after following different histories in the (H, T) phase space is non-cumulative in nature, which is also known as the phenomena of rejuvenation. These experimental observations of relaxation dynamics along with the features of microstructure of our sample seem to agree with the theoretical models of aging phenomenon in a system of elastic lines pinned by random quenched disorder that leads to hierarchical modes of relaxation.

18.
J Pediatr Hematol Oncol ; 44(4): 186-190, 2022 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-35293880

RESUMO

The median age of presentation for Hodgkin lymphoma (HL) is lower in developing countries with a higher proportion under 5 years of age possibly attributable to the high prevalence of Epstein-Barr virus-driven disease. It is unclear whether the clinical presentation and outcomes of this cohort are different with concern regarding late effects being most pronounced in this age group. We report the outcome of children under 5 years of age enrolled in the InPOG-HL-15-01, the first multicentric collaborative study for newly diagnosed children and adolescents with HL from India. Thirty-five (9%) of the study population was younger than 5 years with a striking male preponderance of 34:1. They were less likely to have bulky disease, mediastinal or splenic involvement. The outcomes appear to be at least as favorable as in the older patient group. Efforts need to be made to evolve treatment strategies that spare this very young cohort from potential late effects.


Assuntos
Infecções por Vírus Epstein-Barr , Doença de Hodgkin , Adolescente , Criança , Pré-Escolar , Infecções por Vírus Epstein-Barr/complicações , Infecções por Vírus Epstein-Barr/diagnóstico , Infecções por Vírus Epstein-Barr/epidemiologia , Herpesvirus Humano 4 , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/terapia , Humanos , Masculino , Mediastino/patologia , Prevalência
19.
Indian J Hematol Blood Transfus ; 38(1): 132-137, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35125721

RESUMO

The pathogenesis of hypercoagulability in HIV infection is multifactorial and usually more than one factor is responsible for a thromboembolic episode. The present study was conducted to evaluate the effect of HIV infection and antiretroviral therapy on various coagulation parameters in paediatric patients. Forty two newly diagnosed paediatric patients with HIV infection who were enrolled at the Anti-Retro viral Therapy (ART) centre of Kalawati Saran Children's Hospital were included in the study. The patients were grouped into 4 clinical stages according to the WHO clinical staging of HIV disease. Coagulation tests [PT, aPTT, fibrinogen, D-Dimer and coagulation inhibitors i.e. Protein C (PC), Protein S (PS) and antithrombin III (AT III), Lupus anticoagulant (LA) and Anti phospholipid antibody (APLA)] were performed in all the patients at the time of diagnosis and repeated after 6 months. All the patients were started on antiretroviral therapy within 2 months of their diagnosis. At the time of diagnosis, prolonged PT and aPTT were observed in 30.9% and 23% of the cases respectively. Hyperfibinogenemia was seen in 11.9% of patients. D-Dimer was raised in 83.3% of patients. PS, PC & AT activities were reduced in 90.4%, 42.8% & 11.9% of cases respectively. A reduction in the PC and AT activity was seen from clinical stage 1 to 4, but the change was not statistically significant. On follow up after 6 months, a statistically significant reduction in the level of fibrinogen and D-Dimer was seen. Even though there was improvement in the activity of all the coagulation inhibitor after 6 months, statistically significant improvement was seen only for PS. The current study shows that HIV produces a hypercoagulable state in children. Raised d-dimer level and deficiency of natural anticoagulants contribute to the thrombophilic state.

20.
Indian J Hematol Blood Transfus ; 38(1): 178-183, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35125727

RESUMO

Beta thalassemia major is associated with a subclinical hypercoagulable state. Endothelial activation markers like soluble Intercellular adhesion molecule (sICAM-1) and E-selectin have been implicated in the pathogenesis of endothelial dysfunction and hemostatic alterations. In this study we aimed to study serum levels of sICAM-1 and E-selectin in polytransfused children with ß thalassemia major and their association with serum ferritin and D-dimer levels. Sixty-two polytransfused ß-thalassemia major children aged between 5 and 17 years and 26 age and gender matched healthy controls were enrolled in the study. Complete blood count with peripheral smear, liver function tests, serum ferritin, coagulation tests [PT, APTT, D-dimer] and endothelial activation marker tests [ICAM-1 and E-selectin] were performed. PT, APTT and D-dimer levels were significantly higher in beta-thalassemia major patients than in control group (p = 0.003, p < 0.001, p < 0.001 respectively). Mean ICAM-1 and E-selectin levels were 731.34 ± 343.97 ng/ml and 111.75 ± 40.13 ng/ml respectively which were significantly higher than control group (p < 0.001, p < 0.001 respectively). No significant correlation of ICAM-1 and E-selectin was observed with serum ferritin, PT, APTT and D-dimer levels. The findings of the present study suggest that there is ongoing subclinical activation of coagulation cascade and fibrinolytic system in these patients. Endothelial activation markers may be used as early indicators of endothelial dysfunction to assess the thrombotic complications in beta thalassemia.

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