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https://www.readbyqxmd.com/read/27917302/characterization-of-the-blood-brain-barrier-in-pediatric-central-nervous-system-neoplasms
#1
Christopher S Hong, Winson Ho, Martin G Piazza, Abhik Ray-Chaudhury, Zhengping Zhuang, John D Heiss
OBJECTIVE: The normal blood-brain barrier (BBB) is composed of tight junctions between endothelial cells and surrounding astrocyte foot processes. Breakdown of the physiological astrocyte-endothelial cell relationship occurs in adult metastatic and primary brain tumors. However, the astrocyte-endothelial cell relationship has not been studied in pediatric tumors. MATERIALS AND METHODS: Utilizing specimens from cases of pilocytic astrocytoma (n = 5), medulloblastoma (n = 5), and low-grade diffuse astrocytoma (n = 1), immunofluorescence were performed using primary antibodies against CD31, glial fibrillary acidic protein (GFAP), and aquaporin 4 (AQ4)...
2016: Journal of Interdisciplinary Histopathology
https://www.readbyqxmd.com/read/27906588/fertility-preservation-in-pediatric-and-adolescent-oncology-patients-the-decision-making-process-of-parents
#2
Nancy Li, Yasmin Jayasinghe, Matthew A Kemertzis, Paddy Moore, Michelle Peate
PURPOSE: Decisions surrounding fertility preservation (FP) in children, adolescents, and adults can be difficult due to the distress of a cancer diagnosis, time constraints for decision-making, and lack of efficacy data. This review examines the decision-making process of oncology patients and their parents (if patients are in the pediatric or adolescent population) to better understand experiences of decisional conflict and regret. METHODS: Two electronic databases, Embase and Pubmed, were searched using the terms (Decision-making OR Conflict (Psychology) OR Decision regret) AND (Freezing OR Oocyte OR Ovarian tissue OR Semen preservation OR Fertility preservation OR Cryopreservation) AND (Neoplasms OR Cancer OR Chemotherapy OR Drug therapy OR Radiotherapy)...
December 1, 2016: Journal of Adolescent and Young Adult Oncology
https://www.readbyqxmd.com/read/27894618/primary-pulmonary-pleural-melanoma-in-a-13-year-old-presenting-as-pleural-effusion
#3
Nick Baniak, Mark Podberezin, Selliah C Kanthan, Rani Kanthan
Melanoma in children, adolescents, and young adults is uncommon and reported almost exclusively as cutaneous melanoma. Melanoma presenting as a pleural effusion is very rare in adults and not reported in the pediatric population. Additionally, primary pulmonary melanoma is overall very rare and undocumented in pediatric patients. Furthermore, the distinction between a primary pulmonary/pleural melanoma versus a regressed cutaneous melanoma with pulmonary/pleural metastases remains extremely challenging. We discuss a case of a previously healthy 13-year-old girl that presented with a left-sided pleural effusion...
November 16, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/27893285/recent-advances-in-subtyping-tumors-of-the-central-nervous-system-using-molecular-data
#4
Jens Schittenhelm
Primary brain tumors account for substantial morbidity and mortality. They often infiltrate the brain diffusely, continue growing, and cause adverse events, such as headaches, seizures, and neurological deficits. The classification of primary brain tumors, based for decades on histology, has been fundamentally changed by the World Health Organization in 2016 by incorporation of molecular data. Areas covered: Literature from glioblastomas, high- and low-grade astrocytic, oligodendroglial, glioneuronal and ependymal tumors from the last five years were reviewed...
November 28, 2016: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/27874206/spitz-nevi-and-other-spitzoid-neoplasms-in-children-overview-of-incidence-data-and-diagnostic-criteria
#5
REVIEW
Emi Dika, Giulia Maria Ravaioli, Pier Alessandro Fanti, Iria Neri, Annalisa Patrizi
Spitz nevi are benign melanocytic neoplasms characterized by epithelioid or spindle melanocytes or both. In some rare cases their presentation overlaps with the clinical and histopathologic features of malignant melanoma, so a differential diagnosis can be difficult to make. Intermediate forms between Spitz nevi and malignant melanoma, with unpredictable behavior, have been called atypical Spitz tumors. A literature search was performed to review the clinical, dermoscopic, genetic, and histopathologic aspects of spitzoid tumors...
November 22, 2016: Pediatric Dermatology
https://www.readbyqxmd.com/read/27869523/nelarabine-in-the-treatment-of-pediatric-and-adult-patients-with-t-cell-acute-lymphoblastic-leukemia-and-lymphoma
#6
Tapan M Kadia, Varsha Gandhi
Introduction T-cell acute lymphoblastic leukemia (ALL) and lymphoma (LBL) are aggressive hematologic neoplasms that are treated with combination chemotherapy in the frontline, but have limited options in the relapsed or refractory setting. Based on observations in patients with purine nucleoside phosphorylase (PNP) deficiency, a guanosine nucleoside analogue, arabinosylguanine (ara-G) was developed that provided T-cell specificity. Nelarabine was developed as the water-soluble, clinically useful-prodrug of ara-G and based on its activity was approved for the treatment of relapsed or refractory T-ALL/LBL...
November 21, 2016: Expert Review of Hematology
https://www.readbyqxmd.com/read/27868231/aprepitant-in-pediatric-patients-using-moderate-and-highly-emetogenic-protocols-a-systematic-review-and-meta-analyses-of-randomized-controlled-trials
#7
Lucas Miyake Okumura, Fernanda D' Athayde Rodrigues, Maria Angelica Pires Ferreira, Leila Beltrami Moreira
AIMS: To review the efficacy and safety of aprepitant in combination with ondansetron and dexamethasone (triple therapy) in children and adolescents on moderate to highly emetogenic chemotherapy. METHODS: Medline, Embase, Scielo, Lilacs, Cochrane and congress abstracts published until September 2016 were used as data sources. Two reviewers independently selected manuscripts and extracted data. A third reviewer solved discrepancies in study's selection and data extraction...
November 20, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27860221/spitz-nevi-diverse-clinical-dermatoscopic-and-histopathological-features-in-childhood
#8
Emi Dika, Iria Neri, Pier Alessandro Fanti, Alessia Barisani, Giulia Maria Ravaioli, Annalisa Patrizi
BACKGROUND AND OBJECTIVES: The characterization of clinical features and biological potential of Spitz nevi has attracted a lot of interest in past decades. The aim of our paper was to describe the clinical, dermatoscopic features as well as the clinical outcome of surgically excised Spitz nevi in three different pediatric age groups. PATIENTS AND METHODS: A retrospective study analyzing clinical features, videodermatoscopic images, histopathological diagnosis and patient outcome...
November 10, 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27848891/second-malignant-neoplasms-in-childhood-cancer-survivors
#9
Rejin Kebudi, Gül Nihal Özdemir
The survival of children with cancer have improved dramatically in the last decades. Survivors of childhood cancer are at increased risk of long-term complications of therapeutic exposure. Second malignant neoplasms are one of the most severe side effects of cancer treatment. The frequency and type of secondary cancers may vary depending on the initial diagnosis, treatment administered and genetic predisposition. This review highlights the risk factors in the development of SMNs in survivors of pediatric cancers and their differences according to primary cancer type, genetic predisposition and treatment admistered...
November 14, 2016: Current Pediatric Reviews
https://www.readbyqxmd.com/read/27846658/late-effects-following-treatment-of-hodgkin-lymphoma-during-childhood-and-adolescence-results-of-the-hodgkin-lymphoma-late-effects-research-project
#10
W Dörffel, M Riepenhausen, H Lüders, J Brämswig
Survival rates have been excellent in patients treated for Hodgkin lymphoma (HL) during childhood and adolescence. Unfortunately, severe treatment related late effects have been observed. It was therefore an important aim of the cooperative pediatric HL therapy studies in Germany to reduce the number of late effects without jeopardizing the excellent treatment results. Progress and relapses of HL were analyzed to obtain important information for the future salvage therapy. All late effects were documented and their etiologies analyzed...
November 2016: Klinische Pädiatrie
https://www.readbyqxmd.com/read/27834132/surgical-management-of-medullary-thyroid-carcinoma-in-pediatric-age
#11
Claudio Spinelli, Leonardo Rossi, Silvia Strambi, Jessica Piscioneri, Rossella Elisei, Maura Massimino, Paolo Miccoli
Medullary thyroid carcinoma (MTC) is a rare, accounting for 5% of thyroid malignancies. It is a neuroendocrine tumor wich origins from thyroid parafollicular cells. It may be sporadic, mostly in adult patients, or inherited as autosomal dominant pattern, mostly in pediatric patients. As familial cancer, MTC may presented isolated as familial medullary thyroid carcinoma (FMTC) - 10% of cases - or, most often, as part of multiple endocrine neoplasm type 2 (MEN 2A or MEN 2B) syndromes - 90% of cases. The therapy for sporadic or hereditary MTC is surgical resection and consists in total thyroidectomy associated with central compartment lymph nodal dissection; the radicality of this intervention is fundamental to obtain a definitive cure...
November 11, 2016: Current Pediatric Reviews
https://www.readbyqxmd.com/read/27828868/prenatal-diagnosis-and-genetic-discoveries-of-an-intracranial-mixed-neuronal-glial-tumor-a-case-report-and-literature-review
#12
Lijuan Sun, Qingqing Wu, Yan Pei, Jinghua Li, Jintang Ye, Wenxue Zhi, Yan Liu, Puqing Zhang
BACKGROUND: Congenital intracranial tumors as a group are quite rare, representing only 0.5% to 1.5% of all pediatric brain neoplasms. CASE REPORT: We reported a case of congenital mixed neuronal-glial tumor detected by ultrasound at 30 weeks of gestation. It showed that the tumor was 2.5 × 2.3 × 2.1 cm in size, located in the sellar region, regular shape, and slightly heterogeneous solid mass with a little cystic component. No color flow was present inside the tumor, but the peripheral encirclement by arterial circle of Willis...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27812792/polymorphous-low-grade-neuroepithelial-tumor-of-the-young-plnty-an-epileptogenic-neoplasm-with-oligodendroglioma-like-components-aberrant-cd34-expression-and-genetic-alterations-involving-the-map-kinase-pathway
#13
Jason T Huse, Matija Snuderl, David T W Jones, Carole D Brathwaite, Nolan Altman, Ehud Lavi, Richard Saffery, Alexandra Sexton-Oates, Ingmar Blumcke, David Capper, Matthias A Karajannis, Ryma Benayed, Lukas Chavez, Cheddhi Thomas, Jonathan Serrano, Laetitia Borsu, Marc Ladanyi, Marc K Rosenblum
Epileptogenic tumors affecting children and young adults are a morphologically diverse collection of neuroepithelial neoplasms that, as a group, exhibit varying levels of glial and/or neuronal differentiation. Recent advances in molecular profiling technology, including comprehensive DNA sequencing and methylation analysis, have enabled the application of more precise and biologically relevant classification schemes to these tumors. In this report, we describe a morphologically and molecularly distinct epileptogenic neoplasm, the polymorphous low-grade neuroepithelial tumor of the young (PLNTY), which likely accounts for a sizable portion of oligodendroglioma-like tumors affecting the pediatric population...
November 3, 2016: Acta Neuropathologica
https://www.readbyqxmd.com/read/27808462/pediatric-8p11-eosinophilic-myeloproliferative-syndrome-ems-a-case-report-and-review-of-the-literature
#14
REVIEW
Jay F Sarthy, Naresh Reddivalla, Mohamed Radhi, Katherine Chastain
The 8p11 eosinophilic myeloproliferative syndrome (EMS) is an aggressive neoplasm driven by translocation of the fibroblast growth factor receptor 1 and often transforms to leukemias and lymphomas that are refractory to treatment. The first case was identified in 1983, and to date over 70 cases have been reported in the literature. Despite those reports, no consensus exists on management of this condition, and inconsistency in treatment regimens is even more pronounced in the pediatric literature. We report a case of a male infant with the 8p11 EMS, review the published pediatric experience with EMS, and discuss treatment strategies for this enigmatic hematological disorder...
November 3, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27805526/histologic-changes-in-bone-marrow-biopsies-from-liver-transplant-patients
#15
Pelin Börcek, Binnaz Handan Özdemir, Çiğdem Sercan, Eda Yılmaz Akçay, Sema Karakuş, Mehmet Haberal
OBJECTIVES: Liver transplant may complicated by various hematologic conditions, resulting in indication for bone marrow biopsy. Immunosuppressive therapies, specific infections, and secondary neoplasms affect bone marrow. In the present study, we evaluated the histologic spectrum of bone marrow findings in liver allograft recipients. MATERIALS AND METHODS: Of 338 patients who received liver transplants and were followed at the Başkent University, Faculty of Medicine, 44 patients underwent bone marrow biopsy...
November 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27796764/more-cases-of-benign-testicular-teratomas-are-detected-in-adults-than-in-children-a-clinicopathological-study-of-543-testicular-germ-cell-tumor-cases
#16
Semjén David, Farkas András, Kalman Endre, Kaszas Balint, Kovács Árpad, Pusztai Csaba, Szuhai Karoly, Tornóczky Tamás
Benign testicular teratomas are always thought to be pediatric neoplasms and previously all the teratoid tumors in the adult testis regarded as malignant. Recently, three publications reported benign testicular teratomas in adulthood and the latest WHO classification refers them as "prepubertal type of teratomas" which rarely appear in adulthood. These neoplasms behave benign and seemingly analogous independently whether they appear in pre- or postpubertal patients. The aim of our study was to investigate the frequency of benign testicular teratomas both in children and adults...
October 28, 2016: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/27783314/space-occupying-lesions-in-the-liver
#17
REVIEW
Manigandan Subramanyam Thyagarajan, Khalid Sharif
Space occupying liver lesions usually present with abdominal pain or abnormal physical findings, such as a palpable abdominal mass or distention. Liver lesions identified in children include benign and malignant neoplasms, inflammatory masses, cysts and metastatic lesions. Two-thirds of liver lesions in children are malignant. Hepatoblastoma accounts for two-thirds of malignant liver tumors in children. Benign lesions of the liver in children include vascular lesions, hamartomas, adenomas, and focal nodular hyperplasia...
October 25, 2016: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/27769870/braf-exon-15-mutations-in-pediatric-renal-stromal-tumors-prevalence-in-metanephric-stromal-tumors
#18
Lily Marsden, Lawrence J Jennings, Samantha Gadd, Min Yu, Elizabeth J Perlman, Mariana M Cajaiba
Metanephric stromal tumors are rare renal stromal tumors that predominantly affect children. They belong to the metanephric family of tumors along with metanephric adenofibroma and metanephric adenoma. The previous documentation of BRAF exon 15 mutations in 88% of metanephric adenomas and in isolated cases of metanephric adenofibroma prompted us to investigate the prevalence of these mutations in metanephric stromal tumors and in other pediatric renal stromal tumors. In this study, 17 metanephric stromal tumors, 22 congenital mesoblastic nephromas and 6 ossifying renal tumors of infancy were selected for BRAF exon 15 testing...
October 18, 2016: Human Pathology
https://www.readbyqxmd.com/read/27762604/focal-benign-disorders-of-the-pediatric-mandible-with-radiologic-histopathologic-correlation-mandibular-development-and-lucent-lesions
#19
Matthew R Plunk, Dolphine Oda, Shawn E Parnell, Jason N Wright, Bonnie L Cole, Ramesh S Iyer
OBJECTIVE: Lucent lesions of the pediatric mandible may present variably. Cysts, neoplasms, and developmental and inflammatory conditions have a host of possible causes. There is also substantial overlap in the imaging appearance of cysts and that of benign but locally aggressive tumors that need to undergo resection. CONCLUSION: The purpose of this article is to present common and uncommon lucent lesions of the mandible in children, with an emphasis on benign abnormalities...
October 20, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27762097/comparative-retrospective-study-on-the-modalities-of-biopsying-peripheral-neuroblastic-tumors-a-report-from-the-italian-pediatric-surgical-oncology-group-gicop
#20
Stefano Avanzini, Maria Grazia Faticato, Alessandro Crocoli, Calogero Virgone, Camilla Viglio, Elisa Severi, Anna Maria Fagnani, Giovanni Cecchetto, Giovanna Riccipetitoni, Bruno Noccioli, Ernesto Leva, Angela Rita Sementa, Girolamo Mattioli, Alessandro Inserra
BACKGROUND: Peripheral neuroblastic tumors are the most common extracranial solid neoplasms in children. Early and adequate tissue sampling may speed up the diagnostic process and ensure a prompt start of optimal treatment whenever needed. Different biopsy techniques have been described. The purpose of this multi-center study is to evaluate the accuracy and safety of the various examined techniques and to determine whether a preferential procedure exists. METHODS: All children who underwent a biopsy, from January 2010 to December 2014, as a result of being diagnosed with a peripheral neuroblastic tumor, were retrospectively reviewed...
October 20, 2016: Pediatric Blood & Cancer
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