Donna Lynn Johnston

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BACKGROUND Atypical teratoid rhabdoid tumours (ATRT) are aggressive brain tumours mostly occurring in early childhood. Largest published series arise from registries and institutional experiences (1-4). The aim of this report is to provide population-based data to further characterise this rare entity and to delineate prognostic factors. PATIENTS AND(More)
Amplification of the C19MC oncogenic miRNA cluster and high LIN28 expression has been linked to a distinctly aggressive group of cerebral CNS-PNETs (group 1 CNS-PNETs) arising in young children. In this study, we sought to evaluate the diagnostic specificity of C19MC and LIN28, and the clinical and biological spectra of C19MC amplified and/or LIN28+(More)
Choroid plexus tumors (CPT) are rare pediatric tumors. A population-based study on choroid plexus carcinoma (CPC) and choroid plexus papilloma (CPP) was carried out to describe the incidence, demographic, and outcome data and to identify potential prognostic factors. The CPT population from the Canadian databank of CNS tumor in children ≤36 months diagnosed(More)
BACKGROUND The Psychosocial Screening Tool (PAT) was developed and validated with a sample of caregivers of children newly diagnosed with cancer in the United States. This study aimed to assess cultural adaptation (Phase 1) and validity and reliability of the revised PAT (PATrev) with a Canadian sample (Phase 2). PROCEDURE In Phase 1, a convenience sample(More)
BACKGROUND Rhabdoid brain tumours, also called atypical teratoid rhabdoid tumours, are lethal childhood cancers with characteristic genetic alterations of SMARCB1/hSNF5. Lack of biological understanding of the substantial clinical heterogeneity of these tumours restricts therapeutic advances. We integrated genomic and clinicopathological analyses of a(More)
BACKGROUND Carboplatin-based regimens have demonstrated activity in pediatric patients with low-grade glioma (LGG). However, carboplatin hypersensitivity reaction (Cb HSR) represents a common and limiting factor for the continuation of therapy. METHODS The objectives of this study were to describe the prevalence, characteristics, and management of Cb HSR(More)
PURPOSE Palliative care prevents or relieves the symptoms caused by life-threatening medical conditions. Previous surveys have shown both underuse and lack of availability of these services for children with cancer throughout North America. We sought to investigate the current practices and resources surrounding palliative and end-of-life care among(More)
BACKGROUND Pain is one of the most common and distressing symptoms reported by adolescents with cancer. Despite advancements in pain assessment and management research, pain due to cancer and/or its treatments continues to be poorly managed. Our research group has developed a native iPhone application (app) called Pain Squad to tackle the problem of poorly(More)
We previously identified published scales for symptom assessment in pediatric cancer patients. The objectives of this study were to identify if any of these scales were suitable for use or adaptation as a self-report symptom screening tool, and if not, to begin the process of creating a new tool. A focus group of ten healthcare professionals with expertise(More)
Although telomeres are maintained in most cancers by telomerase activation, a subset of tumors utilize alternative lengthening of telomeres (ALT) to sustain self-renewal capacity. In order to study the prevalence and significance of ALT in childhood brain tumors we screened 517 pediatric brain tumors using the novel C-circle assay. We examined the(More)