Publications by authors named "Timothy A Ritzmann"

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Spotting childhood abdominal tumours: a systematic review and meta-analysis of the clinical presentation.
Lorna Ni Cheallaigh, Jo-Fen Liu, Ashley Ball-Gamble, David Walker, Timothy A Ritzmann

Arch Dis Child· October 2025

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Neither Small Adults nor Big Children: Doing Better for TYAs with Brain Tumors.
Timothy A Ritzmann, Rebecca Hodgkinson, Shaarna Shanmugavadivel

Clin Cancer Res· August 2025

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Quantifying diagnostic intervals and routes to diagnosis for children and young people with cancer in the UK (Childhood Cancer Diagnosis study, CCD): a population-based observational study.
Dhurgshaarna Shanmugavadivel, Jo-Fen Liu, Timothy A Ritzmann, Ashley Ball-Gamble, Angela Polanco

Lancet Reg Health Eur· July 2025

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Optimizing biomarkers for accurate ependymoma diagnosis, prognostication, and stratification within International Clinical Trials: A BIOMECA study.
Rebecca J Chapman, David R Ghasemi, Felipe Andreiuolo, Valentina Zschernack, Arnault Tauziede Espariat, Timothy A Ritzmann

Neuro Oncol· October 2023

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Significant increase of high-risk chromosome 1q gain and 6q loss at recurrence in posterior fossa group A ependymoma: A multicenter study.
Andrew M Donson, Kelsey C Bertrand, Kent A Riemondy, Dexiang Gao, Yonghua Zhuang, Timothy A Ritzmann

Neuro Oncol· October 2023

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Multi-omic approach identifies hypoxic tumor-associated myeloid cells that drive immunobiology of high-risk pediatric ependymoma.
Andrea M Griesinger, Kent Riemondy, Nithyashri Eswaran, Andrew M Donson, Nicholas Willard, Timothy A Ritzmann

iScience· September 2023

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Spatial transcriptomic analysis delineates epithelial and mesenchymal subpopulations and transition stages in childhood ependymoma.
Rui Fu, Gregory A Norris, Nicholas Willard, Andrea M Griesinger, Kent A Riemondy, Timothy A Ritzmann

Neuro Oncol· April 2023

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Recurrent ACVR1 mutations in posterior fossa ependymoma.
Drew Pratt, Calixto-Hope G Lucas, Pavalan Panneer Selvam, Zied Abdullaev, Courtney Ketchum, Timothy A Ritzmann

Acta Neuropathol· August 2022

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SIOP Ependymoma I: Final results, long-term follow-up, and molecular analysis of the trial cohort-A BIOMECA Consortium Study.
Timothy A Ritzmann, Rebecca J Chapman, John-Paul Kilday, Nicola Thorp, Piergiorgio Modena

Neuro Oncol· June 2022

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Toward Improved Diagnosis Accuracy and Treatment of Children, Adolescents, and Young Adults With Ependymoma: The International SIOP Ependymoma II Protocol.
Pierre Leblond, Maura Massimino, Martin English, Timothy A Ritzmann, Lorenza Gandola

Front Neurol· June 2022

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Phase II study of intravenous etoposide in patients with relapsed ependymoma (CNS 2001 04).
John R Apps, Shanna Maycock, David W Ellison, Timothy Jaspan, Timothy A Ritzmann

Neurooncol Adv· April 2022

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Multicentre service evaluation of presentation of newly diagnosed cancers and type 1 diabetes in children in the UK during the COVID-19 pandemic.
Gemma Williams, Ross McLean, Jo-Fen Liu, Timothy A Ritzmann, Madhumita Dandapani

BMJ Paediatr Open· February 2022

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Pediatric ependymomas: destined to recur?
Timothy A Ritzmann, John-Paul Kilday, Richard G Grundy

Neuro Oncol· June 2021

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Assessment of Cannabidiol and Δ9-Tetrahydrocannabiol in Mouse Models of Medulloblastoma and Ependymoma.
Clara Andradas, Jacob Byrne, Mani Kuchibhotla, Mathew Ancliffe, Anya C Jones, Timothy A Ritzmann

Cancers (Basel)· January 2021

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A retrospective analysis of recurrent pediatric ependymoma reveals extremely poor survival and ineffectiveness of current treatments across central nervous system locations and molecular subgroups.
Timothy A Ritzmann, Hazel A Rogers, Simon M L Paine, Lisa C D Storer, Thomas S Jacques

Pediatr Blood Cancer· September 2020

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Molecular heterogeneity and CXorf67 alterations in posterior fossa group A (PFA) ependymomas.
Kristian W Pajtler, Ji Wen, Martin Sill, Tong Lin, Wilda Orisme, Timothy A Ritzmann

Acta Neuropathol· August 2018

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