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Moreira DC, Qaddoumi I, Spiller S, Bouldin TW, Davidson A, Saba-Silva N, Sullivan DV, Tanaka R, Wagner AS, Wood M, Klimo P, Job G, Devidas M, Li X, Gajjar A, Robinson GW, Chiang J. Comprehensive analysis of MYB/MYBL1-altered pediatric-type diffuse low-grade glioma. Neuro Oncol 2024:noae048. [PMID: 38466086 DOI: 10.1093/neuonc/noae048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Indexed: 03/12/2024] Open
Abstract
BACKGROUND Pediatric-type diffuse low-grade gliomas (pLGG) harboring recurrent genetic alterations involving MYB or MYBL1 are closely related tumors. Detailed treatment and outcome data of large cohorts are still limited. This study aimed to comprehensively evaluate pLGG with these alterations to define optimal therapeutic strategies. METHODS We retrospectively reviewed details of pLGG with MYB or MYBL1 alterations from patients treated or referred for pathologic review at St. Jude Children's Research Hospital. Tumor specimens were centrally reviewed, and clinical data were collated. RESULTS Thirty-three patients (18 male; median age, 5 y) were identified. Two tumors had MYBL1 alterations; 31 had MYB alterations, MYB::QKI fusion being the most common (n=10, 30%). Most tumors were in the cerebral hemispheres (n=22, 67%). Two patients (6%) had metastasis at diagnosis. The median follow-up was 6.1 years. The 5-year event-free survival (EFS) rate was 81.3±8.3%; the 5-year overall survival (OS) rate was 96.4±4.1%. Patients receiving a near-total or gross-total resection had a 5-year EFS of 100%; those receiving a biopsy or subtotal resection had a 5-year EFS rate of 56.6±15.2% (p<0.01). No difference in EFS was observed based on location, histology, or molecular alterations. However, the tumors that progressed or metastasized may have distinct methylation profiles with evidence of activation of the MAPK and PI3K/AKT/mTOR pathways. CONCLUSIONS pLGG with MYB/MYBL1 alterations have good outcomes. Our findings suggest that surgical resectability is a crucial determinant of EFS. Further characterization is required to identify optimal treatment strategies for progressive tumors.
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Affiliation(s)
- Daniel C Moreira
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Ibrahim Qaddoumi
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Susan Spiller
- Department of Pediatric Hematology/Oncology, East Tennessee Children's Hospital, Knoxville, TN, USA
| | - Thomas W Bouldin
- Department of Pathology, University of North Carolina, Chapel Hill, NC, USA
| | - Alan Davidson
- Department of Pediatric Hematology/Oncology, Red Cross War Memorial Children's Hospital, Cape Town, South Africa
| | - Nasjla Saba-Silva
- Department of Pediatric Oncology, Grupo de Apoio ao Adolescente e à Criança com Câncer (GRAACC), São Paulo, Brazil
| | - Daniel V Sullivan
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA
| | - Ryuma Tanaka
- Department of Pediatric Hematology/Oncology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Aaron S Wagner
- Department of Pathology, Orlando Health, Orlando, FL, USA
| | - Matthew Wood
- Department of Pathology, Oregon Health & Science University, Portland, OR, USA
| | - Paul Klimo
- Department of Surgery, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Neurosurgery, Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Godwin Job
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Meenakshi Devidas
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Xiaoyu Li
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Amar Gajjar
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Giles W Robinson
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jason Chiang
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
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