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Treatment evaluation by volumetric segmentation in pediatric optic pathway glioma: evaluation of the effect of bevacizumab on intra-tumor components.
Bennebroek, Carlien A; Schouten, Christiaan R; Montauban-van Swijndregt, Maartje C; Saeed, Peerooz; Porro, Giorgio L; Pott, Jan W R; Dittrich, Anne T M; Oostenbrink, Rianne; Schouten-van Meeteren, Antoinette Y; de Jong, Marcus C; de Graaf, Pim.
Afiliación
  • Bennebroek CA; Department of Ophthalmology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1100DD, Amsterdam, The Netherlands. c.a.bennebroek@amsterdamUMC.nl.
  • Schouten CR; Cancer Center Amsterdam, Cancer Treatment and Quality of Life, Amsterdam, The Netherlands. c.a.bennebroek@amsterdamUMC.nl.
  • Montauban-van Swijndregt MC; Department of Radiology and Nuclear Medicine, Amsterdam UMC, Location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
  • Saeed P; Department of Ophthalmology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1100DD, Amsterdam, The Netherlands.
  • Porro GL; Department of Ophthalmology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1100DD, Amsterdam, The Netherlands.
  • Pott JWR; Cancer Center Amsterdam, Cancer Treatment and Quality of Life, Amsterdam, The Netherlands.
  • Dittrich ATM; Department of Ophthalmology, Utrecht University Medical Center, Utrecht, The Netherlands.
  • Oostenbrink R; Department of Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
  • Schouten-van Meeteren AY; Department of Pediatrics, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, The Netherlands.
  • de Jong MC; ENCORE-NF1 Center, Department of General Pediatrics, Erasmus MC, Rotterdam, The Netherlands.
  • de Graaf P; Department of Neuro-Oncology, Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands.
J Neurooncol ; 166(1): 79-87, 2024 Jan.
Article en En | MEDLINE | ID: mdl-38150061
ABSTRACT

PURPOSE:

Progressive pediatric optic pathway gliomas (OPGs) are treated by diverse systemic antitumor modalities. Refined insights on the course of intra-tumoral components are limited.

METHODS:

We performed an exploratory study on the longitudinal volumetric course of different (intra-)tumor components by manual segmentation of MRI at the start and after 3, 6 and 12 months of bevacizumab (BVZ) treatment.

RESULTS:

Thirty-one patients were treated with BVZ (median 12 months, range 2-39 months). During treatment the total tumor volume decreased with median 19.9% (range - 62.3 to + 29.7%; n = 30) within the first 3 months, decreased 19.0% (range - 68.8 to + 96.1%; n = 28) between start and 6 months and 27.2% (range -73.4 to + 36.0%; n = 21) between start and 12 months. Intra-tumoral cysts were present in 12 OPGs, all showed a decrease of volume during treatment. The relative contrast enhanced volume of NF1 associated OPG (n = 11) showed an significant reduction compared to OPG with a KIAA1549-BRAF fusion (p < 0.01). Three OPGs progressed during treatment, but were not preceded by an increase of relative contrast enhancement.

CONCLUSION:

Treatment with BVZ of progressive pediatric OPGs leads to a decrease of both total tumor volume and cystic volume for the majority of OPGs with emphasis on the first three months. NF1 and KIAA1549-BRAF fusion related OPGs showed a different (early) treatment effect regarding the tumor enhancing component on MRI, which did not correlate with tumor volume changes. Future research is necessary to further evaluate these findings and its relevance to clinical outcome parameters.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neurofibromatosis 1 / Glioma del Nervio Óptico / Quistes Límite: Child / Humans Idioma: En Revista: J Neurooncol Año: 2024 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neurofibromatosis 1 / Glioma del Nervio Óptico / Quistes Límite: Child / Humans Idioma: En Revista: J Neurooncol Año: 2024 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos