RESUMO
PURPOSE: MRI alone has its limitations for target selection in biopsy or resection in newly diagnosed and pretreated pediatric brain tumor patients. (18)F-FET-PET imaging is considered to identify metabolically active tumor tissue and to differentiate it from therapy-associated changes. We retrospectively analyzed our experience with (18)F-FET-PET in targeted surgical interventions for pediatric brain tumors. METHODS: In 26 cases with lesions suspicious of a growing brain tumor on MRI, either newly diagnosed or after antitumoral treatment led to (18)F-FET-PET imaging for target selection prior to stereotactic biopsy, navigated open biopsy or navigated microsurgical tumor resection. Indications for (18)F-FET-PET imaging were visualization of metabolic active tumor tissue within diffuse tumors or pretreated lesions as well as depicting their extent. RESULTS: (18)F-FET-PET integration in surgery was feasible in all patients using stereotaxy or neuronavigation. Sensitivity for tumor detection was 20/24. (18)F-FET-PET was false positive in two pretreated patients. CONCLUSION: (18)F-FET-PET imaging is helpful for target selection and can be integrated in surgical guidance. (18)F-FET-PET image-guided surgical targeting yielded histological diagnosis with decent specificity and high sensitivity in our cohort of pediatric brain tumor patients. Our results warrant further evaluation of (18)F-FET-PET imaging for surgical guidance.
Assuntos
Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/cirurgia , Neuronavegação/métodos , Compostos Radiofarmacêuticos , Tirosina/análogos & derivados , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Tomografia por Emissão de Pósitrons , Sensibilidade e EspecificidadeRESUMO
The aim of this study is to investigate behaviour problems and emotional regulation of children who's siblings are diagnosed with cancer. Participants were assessed with the Strengths and Difficulties Questionnaire (SDQ) and the MacArthur Story Stem Battery (MSSB). Both instruments were administered twice (shortly after diagnosis and at the end of treatment). Brothers and sisters of 14 children suffering from cancer were compared with 18 siblings of healthy individuals. In the SDQ no differences between the two groups were found. At time 1 the MSSB showed significant differences in number and quality of displayed contents, representation of parents and the way of performing the narrative. At time 2 narratives changed particularly in the treatment group, but some differences still remained. Overall siblings of children suffering from cancer showed more intrapsychic reaction to the disease than became obvious in their behaviour. This fosters the conclusion that there may be a need for specific support for siblings of children with cancer in order to prevent them from psychic disorders and pathological mourning reactions.
Assuntos
Sintomas Afetivos/diagnóstico , Transtornos do Comportamento Infantil/diagnóstico , Neoplasias/psicologia , Irmãos/psicologia , Adaptação Psicológica , Sintomas Afetivos/psicologia , Criança , Transtornos do Comportamento Infantil/psicologia , Transtornos Reativos da Criança/diagnóstico , Transtornos Reativos da Criança/psicologia , Feminino , Seguimentos , Humanos , Controle Interno-Externo , Entrevista Psicológica , Masculino , Neoplasias/diagnóstico , Relações Pais-Filho , Determinação da Personalidade , Técnicas ProjetivasRESUMO
A case of severe diarrhoea associated with synergistic human bocavirus type 1 (HBoV) and human herpes virus type 6 (HHV6) is reported. The case supports the hypotheses that HBoV infection under clinical conditions may depend on helper viruses, or that HBoV replicates by a mechanism that is atypical for parvoviruses, or that HBoV infection can be specifically treated with cidofovir.
Assuntos
Coinfecção/virologia , Citosina/análogos & derivados , Diarreia/virologia , Vírus Auxiliares/fisiologia , Herpesvirus Humano 6/fisiologia , Bocavirus Humano/fisiologia , Organofosfonatos/uso terapêutico , Infecções por Parvoviridae/virologia , Infecções por Roseolovirus/virologia , Antivirais/administração & dosagem , Antivirais/uso terapêutico , Cidofovir , Coinfecção/diagnóstico , Coinfecção/tratamento farmacológico , Coinfecção/patologia , Citosina/administração & dosagem , Citosina/uso terapêutico , DNA Viral/análise , Diarreia/diagnóstico , Diarreia/tratamento farmacológico , Diarreia/patologia , Vírus Auxiliares/efeitos dos fármacos , Herpesvirus Humano 6/efeitos dos fármacos , Bocavirus Humano/efeitos dos fármacos , Humanos , Lactente , Masculino , Organofosfonatos/administração & dosagem , Infecções por Parvoviridae/diagnóstico , Infecções por Parvoviridae/tratamento farmacológico , Infecções por Parvoviridae/patologia , Reação em Cadeia da Polimerase , Infecções por Roseolovirus/diagnóstico , Infecções por Roseolovirus/tratamento farmacológico , Infecções por Roseolovirus/patologia , Carga Viral/efeitos dos fármacosAssuntos
Neoplasias/psicologia , Relações Pais-Filho , Irmãos/psicologia , Criança , Pré-Escolar , Feminino , Humanos , MasculinoRESUMO
Osteonecrosis (ON) is a debilitating side effect of anti-leukemic treatment. Thus far, the role of leukemic infiltration (LI) of bone is unclear. The first 30 children aged ≥10 years, who were enrolled in the ongoing OPAL trial and had MRI studies at diagnosis and at 6 months, were analyzed. MRI revealed extensive LIs in 24 (80%) patients. The signal abnormalities changed back to a physiological signal in 29 out of 30 children at 6 months. Of the 24 children with LIs at diagnosis, 3 (12.5%) developed ON ≥ II, whereas 4 (66.7%) patients without LIs subsequently developed ON ≥ II (p = .016). No differences between children initially presenting with/without LIs were observed concerning age, pubertal stage, white blood count, immunophenotype, and clinical presentation. Initial radiological LI of bone and, thus, single MRI at diagnosis cannot identify children at high risk of developing radiological ON at 6 months into treatment.
Assuntos
Antineoplásicos , Infiltração Leucêmica , Osteonecrose , Leucemia-Linfoma Linfoblástico de Células Precursoras , Antineoplásicos/efeitos adversos , Criança , Humanos , Imageamento por Ressonância Magnética , Osteonecrose/induzido quimicamente , Osteonecrose/diagnóstico por imagem , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico por imagem , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológicoRESUMO
BACKGROUND AND OBJECTIVES: Immunoglobulin (Ig) and T-cell receptor (TCR) gene rearrangements are excellent patient-specific targets for polymerase chain reaction (PCR)-based detection of minimal residual disease (MRD) in acute lymphoblastic leukemia (ALL). Nevertheless, instability of these targets during the course of the disease has important implications for PCR-based MRD monitoring and may lead to false negative results. DESIGN AND METHODS: Several studies have shown that Ig and TCR targets are reasonably stable in ALL between diagnosis and first relapse, but up to now, there are no data on the stability of these targets between first and second relapse. We, therefore, performed a PCR-study on bone marrow samples from 49 children with precursor B-ALL at first and second relapse. Homo-heteroduplex PCR analyses were used for identification of clonal IGH, IGK-Kde, TCRG and TCRD gene rearrangements. Clonal targets were studied by sequencing and/or comparative homo-heteroduplex analysis. RESULTS: In 52% (25/48) of the patients, all PCR targets identified at first relapse were preserved at second relapse; in 92% (44/48) of the patients at least one target and in 73% (35/48) at least two targets remained stable. Best stability was found for IGH and TCRG gene rearrangements. INTERPRETATION AND CONCLUSIONS: Based on these first data about clonal stability of Ig and TCR targets between first and second relapse of childhood precursor B-ALL, we developed a stepwise strategy for appropriate selection of stable PCR targets for MRD monitoring. This strategy was applicable in 84% of the relapsed patients and resulted in at least one stable MRD-PCR target per patient in 98% of these children.
Assuntos
Recidiva Local de Neoplasia/diagnóstico , Leucemia-Linfoma Linfoblástico de Células Precursoras B/diagnóstico , Adolescente , Criança , Pré-Escolar , Células Clonais , Evolução Molecular , Frequência do Gene , Rearranjo Gênico do Linfócito B , Rearranjo Gênico do Linfócito T , Humanos , Imunofenotipagem , Recidiva Local de Neoplasia/patologia , Neoplasia Residual , Reação em Cadeia da Polimerase , Leucemia-Linfoma Linfoblástico de Células Precursoras B/patologiaRESUMO
Second central nervous system (CNS) relapses represent about 7.3% of subsequent recurrences of childhood acute lymphoblastic leukemia (ALL). In most children these subsequent CNS relapses occur during the first 18 months after diagnosis of the first relapse (mean 1.42 +/- 0.73 years). We present a patient who suffered a second ALL relapse in the CNS more than seven years after diagnosis of his first relapse. The leukemic clone was completely stable over more than ten years as shown by minimal residual disease techniques. Possible reasons for the recurrence of the leukemic clone after this very long period of dormancy (e.g. role of the disease site, immune system dysfunction) are discussed.