Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 25
Filter
1.
Indian J Hematol Blood Transfus ; 35(2): 255-259, 2019 Apr.
Article in English | MEDLINE | ID: mdl-30988560

ABSTRACT

Treatment of acute myeloblastic leukemia in children, adolescents and young adults (AYA) is a challenge in low-income countries. To evaluate treatment outcomes of children (≤ 15 years) and AYA (15-30 years) diagnosed with novo AML and treated in a single center according to the AML-MA 2011 protocol. From January 2011 to December 2015, eligible patients (age ≤ 30 years) with novo AML had been enrolled on a uniform treatment protocol. The diagnosis was confirmed according to the FAB classification using the WHO 2008 criteria. Patients with WBC ≥ 50 G/L had pretreated 4 days of hydroxyurea followed by two inductions and two consolidations. Supportive care consisted of transfusion of labile blood products, antibiotics and antifungals, and patient and family education by the hygiene team. 155 patients were recruited, 41 were < 15 years old (22 boys, median age 7.8 years). Of the 114 AYA enrolled, (48 women, median age 23 years). Complete remission after two inductions was 28/41 (68.3%) of the children, including 100% of the children in the favorable group and 71/114 (62.3%) of the AYA, 22 of whom (68.7%) were in the favorable group. The number of deaths among children was 6 (14.6%). The evaluation of the AML-MA-2011 National Protocol in the age groups of children and AYA reveals that the objective of treatment is almost achieved in terms of complete remission in the two age groups.

2.
Pediatr Blood Cancer ; 65(5): e26952, 2018 05.
Article in English | MEDLINE | ID: mdl-29319209

ABSTRACT

BACKGROUND: Pediatric patients receiving induction chemotherapy for newly diagnosed acute lymphoblastic leukemia (ALL) are at high risk of developing life-threatening infections. We investigated whether uniform antibacterial guidelines, including mandatory antibacterial prophylaxis in afebrile patients during induction, decreases the incidence of microbiologically documented bacteremia. METHODS: Between 2012 and 2015, 230 patients with newly diagnosed ALL (aged 1-21) were enrolled on Dana-Farber Cancer Institute ALL Consortium Protocol 11-001 (DFCI 11-001). Induction therapy, regardless of risk group, included vincristine, prednisone, doxorubicin, methotrexate, and PEG-asparaginase. Afebrile patients received fluoroquinolone prophylaxis at the initiation of induction and those presenting with fever received broad-spectrum antibiotics; antibiotics were continued until blood count recovery. Rates of documented bacteremias and fungal infections on DFCI 11-001 were compared to those on the predecessor protocol (DFCI 05-001), which included the same induction phase without antibiotic prophylaxis guidelines. RESULTS: Sixty-six (28.7%) patients received fluoroquinolone prophylaxis, the remaining patients received broad-spectrum antibiotics. Twenty-four (36.4%) patients on prophylaxis developed fever and seven (10.6%) developed bacteremia. The overall rate of infection during induction on DFCI 11-001 was lower than on DFCl 05-001 (14.3% vs. 26.3%, P < 0.0001) due to a decreased rate of bacteremia (10.9% vs. 24.4%, P < 0.0001). The rate of fungal infections (4.8% vs. 3.6%) and induction death (0.9% vs. 2%) was not significantly different. CONCLUSION: For children with newly diagnosed ALL, uniform antibiotic administration until blood count recovery, including fluoroquinolone prophylaxis for afebrile patients, reduced the incidence of bacteremia during the induction phase. Larger, randomized studies should be performed to confirm these findings.


Subject(s)
Antibiotic Prophylaxis , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Bacteremia/prevention & control , Induction Chemotherapy/adverse effects , Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy , Adolescent , Adult , Asparaginase/administration & dosage , Bacteremia/chemically induced , Bacteremia/microbiology , Child , Child, Preschool , Doxorubicin/administration & dosage , Female , Follow-Up Studies , Humans , Infant , Male , Methotrexate/administration & dosage , Polyethylene Glycols/administration & dosage , Precursor Cell Lymphoblastic Leukemia-Lymphoma/pathology , Prednisone/administration & dosage , Prognosis , Survival Rate , Vincristine/administration & dosage , Young Adult
4.
Qual Life Res ; 26(5): 1371-1377, 2017 05.
Article in English | MEDLINE | ID: mdl-27885548

ABSTRACT

PURPOSE: Children with acute lymphoblastic leukemia (ALL), the commonest form of cancer in this age group, suffer considerable morbidity during treatment, with the majority returning to good health soon after therapy has been completed, as reflected in health-related quality of life (HRQL). However, survivors are at risk of many adverse health outcomes later, including obesity, measured by body mass index (BMI), that is compounded by limited physical activity. This study examined the HRQL of long-term survivors of ALL and its relationship to BMI and physical activity. METHODS: A cohort of 75 subjects who were more than 10 years from diagnosis was assessed for BMI (weight in kg/height in m2) and completed two questionnaires. HRQL was measured by the multi-attribute, preference-based Health Utilities Index (HUI) instrument HUI23S4.15Q designed for self-report, and physical activity was quantified by the Habitual Activity Estimation Scale. RESULTS: The mean utility scores for overall HRQL (HUI2 = 0.88, HUI3 = 0.83) were similar to those in the Canadian and US general population segments of equivalent age (HUI2 = 0.86, HUI3 = 0.85). However, the minimum scores (HUI2 = 0.23, HUI3 = -0.09) revealed a group of survivors with notable disabilities in the attributes of hearing, emotion, cognition, and pain. There were no statistically significant correlations between HRQL and BMI or between HRQL and physical activity, except for deafness and inactivity on weekdays. CONCLUSIONS: Overall, long-term survivors of ALL in childhood enjoy good HRQL but some experience appreciable disability, though this is not associated with BMI or, in the main, with physical activity.


Subject(s)
Precursor Cell Lymphoblastic Leukemia-Lymphoma/psychology , Sickness Impact Profile , Survivors/psychology , Adolescent , Adult , Child , Female , Humans , Male , Surveys and Questionnaires , Young Adult
5.
Vox Sang ; 111(3): 299-307, 2016 Oct.
Article in English | MEDLINE | ID: mdl-27231826

ABSTRACT

BACKGROUND & OBJECTIVES: Alloimmunization rates following red blood cell (RBC) transfusion in paediatric oncology are not known. This study aimed to: (1) describe frequency and specificity of alloantibodies in paediatric oncology patients after RBC transfusions; (2) determine the effect of chemotherapy on alloimmunization rate. MATERIALS & METHODS: Retrospective cohort study of paediatric patients at a tertiary care hospital is evaluated by two groups: control group, paediatric patients without cancer; study group, paediatric oncology patients who received chemotherapy. Alloimmunization was defined as clinically significant IgG alloantibody formation against RBC antigens. RESULTS: A total of 1273 children were evaluated including 324 in study group, 909 controls, and 40 haemoglobinopathy patients. Overall, frequency of alloimmunization was 1·5%: 0·3% (95% CI: 0, 1·90) in study group; 1·3% (95% CI: 0·73, 2·32) in control group and 15% in haemoglobinopathies. The association between chemotherapy and alloimmunization was not significant; P value = 0·20 Fisher's exact test, OR 0·23 (95% CI: 0·03, 1·79). CONCLUSION: This is the first study exploring RBC alloimmunization in paediatric patients by diagnosis. Alloimmunization frequency was low. It was not possible to determine an association between chemotherapy and alloimmunization due to the low event rate.


Subject(s)
Erythrocyte Transfusion/adverse effects , Erythrocytes/immunology , Hypersensitivity/etiology , Adolescent , Antineoplastic Agents/therapeutic use , Case-Control Studies , Child , Child, Preschool , Cohort Studies , Female , Hematopoietic Stem Cell Transplantation , Hemoglobinopathies/therapy , Humans , Infant , Isoantibodies/blood , Male , Neoplasms/drug therapy , Retrospective Studies , Tertiary Care Centers
6.
Child Care Health Dev ; 41(4): 547-58, 2015 Jul.
Article in English | MEDLINE | ID: mdl-25351414

ABSTRACT

AIM: To develop a generic self-management skills scale for use with adolescents diagnosed with a chronic health condition who are aged 12 to 18 years. BACKGROUND: There is a lack of methodologically sound scales for healthcare teams to use to measure self-management skills in adolescents with chronic conditions transitioning to adult care. METHODS: Adolescents aged 12 to 18 years with a broad range of chronic health conditions, including neurodevelopmental conditions, were recruited from May to August 2013 from nine outpatient clinics at McMaster Children's Hospital (Canada). Thirty-two participated in a cognitive interview, and 337 completed a questionnaire booklet. Interviews were used to develop the TRANSITION-Q. Rasch measurement theory (RMT) analysis was used to identify items that represent the best indicators of self-management skills. Traditional psychometric tests of measurement performance were also conducted. RESULTS: The response rate was 92% (32/32 cognitive; 337/371 field test). RMT analysis resulted in a 14-item scale with three response options. The overall fit of the observed data to that expected by the Rasch model was non-significant, providing support that this new scale measured a unidimensional construct. Other tests supported the scale as scientifically sound, e.g. Person Separation Index = 0.82; good item fit statistics; no differential item function by age or gender; low residual correlations between items; Cronbach's alpha = 0.85; test-retest reliability = 0.90; and tests of construct validity that showed, as hypothesized, fewer skills in younger participants and in participants who required assistance to complete the scale. Finally, participants who agreed they are ready to transfer to adult healthcare reported higher TRANSITION-Q scores than did participants who disagreed. CONCLUSIONS: The TRANSITION-Q is a short, clinically meaningful and psychometrically sound scale. This generic scale can be used in research and in paediatric and adolescent clinics to help evaluate readiness for transition.


Subject(s)
Chronic Disease/therapy , Continuity of Patient Care , Self Care , Surveys and Questionnaires , Adolescent , Child , Female , Humans , Interviews as Topic , Male , Ontario , Psychometrics , Reproducibility of Results
7.
J Med Genet ; 48(9): 618-28, 2011 Sep.
Article in English | MEDLINE | ID: mdl-21659346

ABSTRACT

INTRODUCTION: Inherited bone marrow failure syndromes (IBMFSs) often have substantial phenotypic overlap, thus genotyping is often critical for establishing a diagnosis. OBJECTIVES AND METHODS: To determine the genetic characteristics and mutation profiles of IBMFSs, a comprehensive population-based study that prospectively enrols all typical and atypical cases without bias is required. The Canadian Inherited Marrow Failure Study is such a study, and was used to extract clinical and genetic information for patients enrolled up to May 2010. RESULTS: Among the 259 primary patients with IBMFS enrolled in the study, the most prevalent categories were Diamond-Blackfan anaemia (44 patients), Fanconi anaemia (39) and Shwachman-Diamond syndrome (35). The estimated incidence of the primary IBMFSs was 64.5 per 10(6) births, with Fanconi anaemia having the highest incidence (11.4 cases per 10(6) births). A large number of patients (70) had haematological and non-haematological features that did not fulfil the diagnostic criteria of any specific IBMFS category. Disease-causing mutations were identified in 53.5% of the 142 patients tested, and in 16 different genes. Ten novel mutations in SBDS, RPL5, FANCA, FANCG, MPL and G6PT were identified. The most common mutations were nonsense (31 alleles) and splice site (28). Genetic heterogeneity of most IBMFSs was evident; however, the most commonly mutated gene was SBDS, followed by FANCA and RPS19. CONCLUSION: From this the largest published comprehensive cohort of IBMFSs, it can be concluded that recent advances have led to successful genotyping of about half of the patients. Establishing a genetic diagnosis is still challenging and there is a critical need to develop novel diagnostic tools.


Subject(s)
Fanconi Anemia Complementation Group A Protein/genetics , Hemoglobinuria, Paroxysmal/genetics , Mutation , Proteins/genetics , Ribosomal Proteins/genetics , Alleles , Anemia, Aplastic , Anemia, Diamond-Blackfan/genetics , Bone Marrow Diseases/genetics , Bone Marrow Failure Disorders , Cohort Studies , Exocrine Pancreatic Insufficiency/genetics , Fanconi Anemia/genetics , Genetic Testing , Humans , Lipomatosis/genetics , Prospective Studies , Shwachman-Diamond Syndrome
8.
Clin Genet ; 79(5): 448-58, 2011 May.
Article in English | MEDLINE | ID: mdl-20569259

ABSTRACT

Our knowledge of the phenotypes of inherited bone marrow failure syndromes (IBMFSs) derives from case reports or case series in which only one IBMFS was studied. However, the substantial phenotypic overlap necessitates comparative analysis between the IBMFSs. Shwachman-Diamond syndrome (SDS) is an IBMFS that the appreciation of what comprises its clinical phenotype is still evolving. In this analysis we used data on 125 patients from the Canadian Inherited Marrow Failure Study (CIMFS), which is a prospective multicenter population-based study. Thirty-four cases of SDS patients were analyzed and compared to other patients with the four most common IBMFSs on the CIMFS: Diamond Blackfan anemia, Fanconi anemia (FA), Kostmann/severe congenital neutropenia and dyskeratosis congenita (DC). The diagnosis of SDS, FA and DC was often delayed relative to symptoms onset; indicating a major need for improving tools to establish a rapid diagnosis. We identified multiple phenotypic differences between SDS and other IBMFSs, including several novel differences. SBDS biallelic mutations were less frequent than in previous reports (81%). Importantly, compared to patients with biallelic mutations, patients with wild type SBDS had more severe hematological disease but milder pancreatic disease. In conclusion, comprehensive study of the IBMFSs can provide useful comparative data between the disorders. SBDS-negative SDS patients may have more severe hematological failure and milder pancreatic disease.


Subject(s)
Bone Marrow Diseases , Exocrine Pancreatic Insufficiency , Hemoglobinuria, Paroxysmal , Lipomatosis , Alleles , Anemia, Aplastic , Bone Marrow Diseases/diagnosis , Bone Marrow Diseases/genetics , Bone Marrow Failure Disorders , Exocrine Pancreatic Insufficiency/diagnosis , Exocrine Pancreatic Insufficiency/genetics , Female , Genetic Association Studies , Hemoglobinuria, Paroxysmal/diagnosis , Hemoglobinuria, Paroxysmal/genetics , Humans , Male , Mutation , Shwachman-Diamond Syndrome
9.
Indian J Pediatr ; 77(6): 669-72, 2010 Jun.
Article in English | MEDLINE | ID: mdl-20532682

ABSTRACT

OBJECTIVE: To evaluate the effects of Tonsillectomy and Adenoidectomy (T&A) on Obstructive Sleep Apnea (OSA) secondary to Upper Airway Obstruction (UAO) in children with Sickle Cell Disease (SCD). METHODS: Twenty eight children with SCD and history of snoring, with or without adeno tonsillar hypertrophy, were evaluated for UAO and OSA. RESULTS: Eight children were confirmed to have OSA by multichannel polysomnography and underwent T&A. Follow up examination showed symptomatic clinical and objective improvement in sleep study parameters in OSA. CONCLUSIONS: T&A appears to be a safe, effective option to treat selected patients with OSA due to UAO in SCD children.


Subject(s)
Adenoidectomy , Anemia, Sickle Cell/surgery , Sleep Apnea, Obstructive/surgery , Tonsillectomy , Adolescent , Anemia, Sickle Cell/complications , Anemia, Sickle Cell/diagnosis , Child , Child, Preschool , Female , Humans , Male , Quality of Life , Retrospective Studies , Sleep Apnea, Obstructive/complications , Sleep Apnea, Obstructive/diagnosis , Treatment Outcome
10.
Blood ; 97(12): 3727-32, 2001 Jun 15.
Article in English | MEDLINE | ID: mdl-11389009

ABSTRACT

To describe the clinical and biologic features of pediatric acute megakaryoblastic leukemia (AMKL) and to identify prognostic factors, experience at St Jude Children's Research Hospital was reviewed. Of 281 patients with acute myeloid leukemia treated over a 14-year period, 41 (14.6%) had a diagnosis of AMKL. Six patients had Down syndrome and AMKL, 6 had secondary AMKL, and 29 had de novo AMKL. The median age of the 22 boys and 19 girls was 23.9 months (range, 6.7-208.9 months). The rate of remission induction was 60.5%, with a 48% rate of subsequent relapse. Patients with Down syndrome had a significantly higher 2-year event-free survival (EFS) estimate (83%) than did other patients with de novo AMKL (14%) or with secondary AMKL (20%; P < or =.038). Among patients who had de novo AMKL without Down syndrome, 2-year EFS was significantly higher after allogeneic bone marrow transplantation (26%) than after chemotherapy alone (0%; P =.019) and significantly higher when performed during remission (46%) than when performed during persistent disease (0%; P =.019). The 5-year survival estimates were significantly lower for de novo AMKL (10%) than for other forms of de novo AML (42%; P <.001). Treatment outcome is very poor for patients with AMKL in the absence of Down syndrome. Remission induction is the most important prognostic factor. Allogeneic transplantation during remission offers the best chance of cure; in the absence of remission, transplantation offers no advantage over chemotherapy alone. (Blood. 2001;97:3727-3732)


Subject(s)
Leukemia, Megakaryoblastic, Acute/diagnosis , Bone Marrow Transplantation , Disease-Free Survival , Down Syndrome/complications , Female , Humans , Leukemia, Megakaryoblastic, Acute/etiology , Leukemia, Megakaryoblastic, Acute/mortality , Male , Neoplasms, Second Primary , Prognosis , Prospective Studies , Remission Induction , Retrospective Studies , Survival Rate , Transplantation, Homologous , Treatment Outcome
11.
J Pediatr Hematol Oncol ; 23(2): 99-104, 2001 Feb.
Article in English | MEDLINE | ID: mdl-11216714

ABSTRACT

PURPOSE: To compare the use of reverse transcriptase polymerase chain reaction (RT-PCR) with that of morphology-based methods for diagnosis, staging, and detection of metastatic disease in pediatric alveolar rhabdomyosarcoma (ARMS), Ewing sarcoma family of tumors (ESFT), and desmoplastic small round cell tumors (DSRCT). MATERIALS AND METHODS: RT-PCR assays for the EWS-FLII, EWS-ERG, PAX3-FKHR, PAX7-FKHR, and EWS-WTI fusion transcripts were performed on RNA extracted from the primary tumor tissue, bone marrow, and body fluids obtained at initial presentation and relapse. Molecular findings were compared with original histologic diagnoses and results of staging procedures. RESULTS: Eighty-eight samples from 47 patients with ARMS (n = 13), ESFT (n = 31), or DSRCT (n = 3) were analyzed. The detection rate of metastatic disease was significantly higher with RT-PCR (95%) as compared with the morphologic methods (70%) for the three pediatric sarcomas studied. In primary tumors with characteristic fusion transcript, RT-PCR was positive in all cases with morphologic evidence of metastatic disease. Moreover, in six patients (3 with ARMS, 2 with DSRCT, and 1 with ESFT) with metastatic disease, micrometastases in bone marrow (4) and other sites (2) were detected by RT-PCR alone. Importantly, none of the patients with localized disease diagnosed had micrometastases detected by RT-PCR in bone marrow. CONCLUSIONS: The high sensitivity and specificity of RT-PCR for the characteristic fusion transcripts of pediatric sarcomas make it an ideal method to aid in the routine staging of these patients. In addition, the 100% sensitivity of RT-PCR in detection of micrometastasis makes it useful for follow-up and detection of minimal residual disease. However, the clinical significance of molecularly-detectable disease remains unknown. Further studies should aim to elucidate the therapeutic and prognostic implications of micrometastases detected by RT-PCR alone.


Subject(s)
Biomarkers, Tumor/genetics , Bone Neoplasms/diagnosis , Oncogene Proteins, Fusion/genetics , RNA, Messenger/genetics , RNA, Neoplasm/genetics , Reverse Transcriptase Polymerase Chain Reaction , Rhabdomyosarcoma, Alveolar/diagnosis , Sarcoma, Ewing/diagnosis , Sarcoma, Small Cell/diagnosis , Soft Tissue Neoplasms/diagnosis , Bone Marrow/pathology , Bone Neoplasms/genetics , Bone Neoplasms/pathology , Child , Chromosomes, Human/genetics , Diagnosis, Differential , Humans , Neoplasm Metastasis , Neoplasm Staging , Neoplasm, Residual , Proto-Oncogene Protein c-fli-1 , RNA-Binding Protein EWS , Rhabdomyosarcoma, Alveolar/genetics , Rhabdomyosarcoma, Alveolar/pathology , Sarcoma, Ewing/genetics , Sarcoma, Ewing/pathology , Sarcoma, Small Cell/genetics , Sarcoma, Small Cell/pathology , Sensitivity and Specificity , Soft Tissue Neoplasms/genetics , Soft Tissue Neoplasms/pathology , Transcription Factors/genetics , Translocation, Genetic
12.
Cancer ; 88(2): 480-90, 2000 Jan 15.
Article in English | MEDLINE | ID: mdl-10640983

ABSTRACT

BACKGROUND: Splenic rupture is an uncommon but life-threatening complication of leukemias and lymphomas, and is reported mostly in adults. The authors investigated the frequency with which splenic rupture is diagnosed in pediatric patients with hematologic malignancies and reviewed its clinical profile and outcome. METHODS: The data base of St. Jude Children's Research Hospital was searched for cases coded as splenic laceration or rupture, splenic infarction, or splenectomy in patients diagnosed with lymphoma or leukemia between January 1962 and December 1997. The medical records of patients with histopathologic or radiologic evidence of splenic rupture were reviewed. The time spanned by the study was divided into early (1962-1990) and recent (1991-1997) eras to reflect the availability of modern diagnostic imaging techniques. RESULTS: Seven children experienced splenic rupture. They were between ages 5-17 years. There were four males and three females. Primary diagnoses included acute myeloid leukemia (four patients), acute lymphoblastic leukemia (two patients), and Hodgkin lymphoma (one patient). Five patients were diagnosed in the recent era and two in the early era. Four patients had radiologic or bacteriologic evidence of fungal infection concomitant with the splenic event. Of five deaths, only two were related causally to splenic rupture; these occurred in the early era. All seven acute episodes of splenic rupture were managed conservatively without surgery. CONCLUSIONS: The overall frequency with which splenic rupture was detected in children with hematologic malignancy at the study institution was 0.18%. In the recent era, the frequency of detection was 9-fold higher (0.55%) than that of the early era (0.06%). Improved imaging techniques and increased utilization of imaging studies may account for the increased incidental detection of "preclinical" splenic rupture. Adolescent age group, acute myeloid leukemia (especially acute promyelocytic leukemia), a high leukocyte count, thrombocytopenia, and coagulopathy may predispose children with leukemia to pathologic splenic rupture. Fungal infection frequently was associated with splenic rupture and may play a role in its pathogenesis.


Subject(s)
Leukemia/complications , Lymphoma/complications , Splenic Rupture/etiology , Adolescent , Child , Child, Preschool , Female , Humans , Incidence , Leukemia/microbiology , Lymphoma/microbiology , Male , Mycoses/complications , Retrospective Studies , Risk Assessment , Splenic Rupture/epidemiology
13.
Med Pediatr Oncol ; 30(1): 67-8, 1998 Jan.
Article in English | MEDLINE | ID: mdl-9371393

ABSTRACT

Poland's syndrome, a rare congenital disorder with pectoralis muscular girdle defect, have been reported in association with lymphoreticular malignancies in the past. Childhood solid tumors in association with this congenital anomaly have not been reported so far. We describe this rare association of Poland's syndrome and Wilms tumor. Due to the possibility of increased risk of leukemogenesis in patients with Poland's syndrome, chemo-radiation therapy of Wilms tumor in our patient may increase the risk of secondary leukemia. Therapeutic modification of primary cancer in these patients may be necessary with careful long-term follow-up for early detection and treatment of secondary cancer.


Subject(s)
Kidney Neoplasms/complications , Poland Syndrome/complications , Wilms Tumor/complications , Humans , Infant , Male
14.
Arch Dis Child ; 73(2): 100-4; discussion 104-5, 1995 Aug.
Article in English | MEDLINE | ID: mdl-7574850

ABSTRACT

Human immunodeficiency virus (HIV) related cancers in children are not as common and as well described as in adults. An HIV epidemic has been prevalent in Zambia since 1983-1984. To study the effect of the epidemic on the epidemiology of cancers in children a retrospective study was undertaken at the University Teaching Hospital (UTH), Lusaka, Zambia. All the histopathological records from 1980 to 1992 were reviewed and all cases of cancers in children less than 14 years of age were analysed. In order to define the effect of the HIV epidemic, the epidemiological features of various childhood cancers occurring before (during the years 1980-1982) and after (during the years 1990-1992) the onset of the HIV epidemic were compared. A significant increase in the occurrence of total childhood cancers was found. This is mostly due to a highly significant increase in the incidence of paediatric Kaposi's sarcoma (p = 0.000016), which is causally related to HIV infection, and a significant increase in the incidence of retinoblastoma (p = 0.02), which has an unknown relation to HIV infection. Though not yet statistically significant, there has also been a gradual and sustained increase in the incidence of non-Hodgkin's lymphoma, nasopharyngeal carcinoma, and rhabdomyosarcoma. There has been a significant reduction in the incidence of Burkitt's lymphoma. A prospective in depth epidemiological study of HIV related childhood cancers in Africa is urgently needed.


Subject(s)
Disease Outbreaks , HIV Infections/epidemiology , Neoplasms/epidemiology , Adolescent , Child , Child, Preschool , Female , HIV Infections/complications , Humans , Incidence , Infant , Infant, Newborn , Kidney Neoplasms/epidemiology , Lymphoma/epidemiology , Male , Nasopharyngeal Neoplasms/epidemiology , Neoplasms/virology , Retrospective Studies , Sarcoma/epidemiology , Sarcoma, Kaposi/epidemiology , Wilms Tumor/epidemiology , Zambia/epidemiology
15.
Indian J Med Res ; 101: 163-9, 1995 Apr.
Article in English | MEDLINE | ID: mdl-7751047

ABSTRACT

A total of 25 patients with primary myelodysplastic syndrome (p-MDS) were cytogenetically investigated. The incidence of abnormal karyotypes was higher, detected in 88 per cent of the patients and the most frequent abnormality was a terminal deletion of chromosome 7 (45% of the patients with abnormal karyotypes) followed by an i (17q) (18%), +21(14%), -5/5q (9%), del (11) (q22) (9%). Cytogenetic analysis after therapy/after leukaemic transformation indicated either stable clones (2 patients) or emergence of new clones such as inv(5) (q32q36), del (17) (p13), +20, +22 (1 patient each). It is to be noted that of the 8 patients with leukaemic transformation, 5 had del (7q). The leukaemic transformation (32% of the patients) was not related to the percentage of abnormal karyotypes not to the percentage of blasts at the time of the MDS presentation. Chromosome instability was shown by 10 (45%) patients. Our data indicate that higher frequency of chromosomal aberrations with involvement of chromosome 7 may be the result of underlying disease.


Subject(s)
Chromosome Aberrations , Myelodysplastic Syndromes/genetics , Adolescent , Adult , Aged , Child , Child, Preschool , Female , Humans , Karyotyping , Male , Middle Aged
16.
Cent Afr J Med ; 41(1): 6-10, 1995 Jan.
Article in English | MEDLINE | ID: mdl-7767936

ABSTRACT

In most of sub-Saharan African, drug resistant falciparum malaria has become a major health care concern. Drug sensitivity was evaluated in vivo in Lusaka, Zambia, in 71 episodes in 61 patients with uncomplicated falciparum malaria, for Chloroquin (CQ), Pyrimethamine/sulfadoxine (PS) and halofantrine (HF). CQ resistance was found at R2 (16 pc) and R3 (24.5 pc) level in 37 patients, R3 (10.5 pc) resistance to PS was found among 19 subjects studied. The drug resistance to CQ was inversely related to age.


Subject(s)
Antimalarials/therapeutic use , Malaria, Falciparum/epidemiology , Plasmodium falciparum/drug effects , Adolescent , Adult , Age Factors , Animals , Child , Child, Preschool , Decision Trees , Drug Monitoring , Drug Resistance , Female , Humans , Infant , Malaria, Falciparum/drug therapy , Male , Middle Aged , Population Surveillance , Prevalence , Prospective Studies , Zambia/epidemiology
17.
Article in English | MEDLINE | ID: mdl-8548353

ABSTRACT

Acquired immunodeficiency syndrome-associated Kaposi's sarcoma (KS) is well documented in adults. However, very little information is available about KS in the pediatric age group. A retrospectively study was undertaken at the University Teaching Hospital (UTH), Lusaka, Zambia, to define the incidence and clinical profile of KS in Zambian children over the last 13 years and to determine the influence, if any, of the current human immunodeficiency virus (HIV) epidemic on the pattern of pediatric KS. All the histopathological records from 1980 to 1992 were reviewed and all cases of KS along with the total number of malignancies, both in children and adults, were analyzed. Along with this, 17 of 23 case files of pediatric KS patients treated at the UTH since 1984 were retrieved and clinical details recorded. Of a total of 915 cases of KS, 85 (9.25%) were in children < 14 years of age. The age ranged from 7 months to 14 years, with an average of 5.62 years; the male/female ratio was 1.76:1. A significant increase in the incidence of pediatric KS has been recorded since 1987 (p < 0.001). This coincides with the advent of the HIV epidemic in the country. The disease was aggressive and fulminant in pediatric patients. More than 80% HIV seropositivity was detected. Children with blood transfusion-related HIV infection had cutaneous or lymphocutaneous disease, indicating that the mode of acquisition of HIV infection may influence the clinical appearance of KS. Thus, HIV-associated KS in children is becoming a common entity in Zambia. An urgent prospective epidemiologic study is needed to address this problem in HIV-affected regions.


Subject(s)
Disease Outbreaks , HIV Infections/epidemiology , HIV-1 , Sarcoma, Kaposi/epidemiology , Adolescent , Age Distribution , Child , Child, Preschool , Female , HIV Infections/complications , HIV Seropositivity/epidemiology , Humans , Incidence , Infant , Male , Retrospective Studies , Sarcoma, Kaposi/complications , Sex Distribution , Zambia/epidemiology
19.
East Afr Med J ; 71(6): 388-91, 1994 Jun.
Article in English | MEDLINE | ID: mdl-7835262

ABSTRACT

The hospital records of 62 Zambian children with sickle cell anaemia (SCA) who died during a 3 year period (January 1987 to December 1989) at the Paediatric Wing of the University Teaching Hospital, Lusaka, Zambia, were reviewed retrospectively. The SCA patients accounted for 2.92 percent of the total admissions and the average case fatality was 6.61 percent of the total SCA admissions. The case fatality rate has reduced considerably as compared to the one observed in 1970 in Zambia, although the major causes of death remain the same. The maximum mortality was noted in the age group of one to five years (54.84%). The common causes of death were infections (29.54%), vasoocclusive crises (22.72%) and splenic sequestration crises (20.45%). The problems of sub-Saharan Africa, like malaria, malnutrition and now the HIV infection also adde to the mortality (15.90%).


PIP: Physicians analyzed the hospital records of 62 sickle cell anemia (SCA) patients who were admitted to the pediatric wing of the University Teaching Hospital in Lusaka, Zambia, between January 1987 and December 1989 and who died. They examined the case fatality rate and the causes of death. During this period, SCA patients comprised 938 of the 31,843 pediatric admissions (2.95%). The case fatality rate of these 938 urban SCA patients was 6.61%, which is much lower than the 1970 rate of 18.57%. The researchers attributed the lower case fatality rate to the comprehensive health care provided by the hospital's sickle cell disease clinic, established in 1971. Sickle cell-related deaths during the study period made up 0.97% of all pediatric deaths. The case fatality rate was 20.17% for all pediatric admissions. SCA-related mortality peaked in the 1-5 year old age group (38.71%) followed by the 6-10 year old age group (20.97%). As for causes of death, the case records of only 44 sickle cell-related deaths were available. The pediatricians were not able to specify the exact clinical diagnosis in 18 case files (29.03%). The major categories of causes of death were infections (29.54%), vaso-occlusive crises (22.72%), and splenic sequestration crises (20.45%). The infections included 6 cases of bronchopneumonia, 4 cases of confirmed malaria, 1 case of pneumococcal meningitis, and 1 case of HIV infection with cardiomyopathy. The researchers were not sure whether the HIV infection or SCA caused cardiomyopathy. An earlier study at the hospital found HIV seroconversion in more and more SCA patients. This study's major obstacles were poor record keeping, poor communication channels, inability to conduct autopsies due to social and cultural reasons, procedural delays, and unavailability of pathologists. These obstacles must be addressed to improve knowledge on death in SCA patients.


Subject(s)
Anemia, Sickle Cell/mortality , Hospital Mortality , Hospitalization , Population Surveillance , Adolescent , Age Factors , Cause of Death , Child , Child, Preschool , Female , Hospital Mortality/trends , Hospitalization/statistics & numerical data , Hospitalization/trends , Humans , Infant , Infant, Newborn , Male , Patient Admission/statistics & numerical data , Patient Admission/trends , Retrospective Studies , Zambia/epidemiology
20.
Indian J Cancer ; 29(3): 117-21, 1992 Sep.
Article in English | MEDLINE | ID: mdl-1338056

ABSTRACT

A two year old female child with bilateral wilms tumor (WT) along with multiple congenital anomalies like bilateral aniridia with congenital cataracts and nystagmus, microcephaly, mental retardation and ventricular septal defect has been described. The karyotype analysis revealed 46 xx, del 11p 13-14.1. Association of ventricular septal defect with the classical features of 'Aniridia-Wilms' tumor association' is an unusual feature in this case.


Subject(s)
Aniridia/complications , Aniridia/genetics , Chromosomes, Human, Pair 11/physiology , Heart Septal Defects, Ventricular/complications , Heart Septal Defects, Ventricular/genetics , Wilms Tumor/complications , Wilms Tumor/genetics , Child, Preschool , Chromosome Deletion , Female , Humans , Karyotyping
SELECTION OF CITATIONS
SEARCH DETAIL
...