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Posterior Fossa Tumors
Lara A Brandão1, Tina Young Poussaint2
1Radiologic Department, Clínica Felippe Mattoso, Fleury Medicina Diagnóstica, Avenida das Américas 700, sala 320, Barra Da Tijuca, Rio De Janeiro, Rio De Janeiro CEP 22640-100, Brazil; Department of Radiology, Clínica IRM- Ressonância Magnética, Rua Capitão Salomão, Humaitá, Rio De Janeiro, Rio De Janeiro CEP 22271-040, Brazil.
Insights
Pediatric posterior fossa tumors are common childhood cancers. Imaging on CT, conventional MRI, and advanced MRI aids in diagnosing these critical brain tumors.
Area of Science:
- Pediatric oncology
- Neuroradiology
- Childhood brain tumors
Background:
- Pediatric brain tumors are a leading cause of cancer-related death in children.
- Posterior fossa tumors represent a significant proportion of pediatric central nervous system neoplasms.
- Accurate and timely diagnosis is crucial for effective treatment and improved outcomes.
Purpose of the Study:
- To review the common pediatric posterior fossa tumors.
- To describe characteristic imaging findings on computed tomography (CT) and conventional magnetic resonance (cMR) imaging.
- To highlight the role of advanced MR imaging techniques in enhancing diagnostic accuracy.
Main Methods:
- Review of common pediatric posterior fossa tumors.
- Discussion of imaging features across CT, cMR, and advanced MR techniques.
- Correlation of imaging findings with typical histopathological diagnoses.
Main Results:
- Medulloblastoma, atypical teratoid/rhabdoid tumor, cerebellar pilocytic astrocytoma, ependymoma, and brainstem glioma are the most frequent posterior fossa tumors.
- Tumor location and specific imaging characteristics on CT and cMR provide diagnostic clues.
- Advanced MR imaging techniques, such as diffusion-weighted imaging and perfusion imaging, improve diagnostic confidence and differentiation of tumor types.
Conclusions:
- Imaging plays a pivotal role in the diagnosis of pediatric posterior fossa tumors.
- Integration of conventional and advanced MR imaging findings facilitates accurate preoperative diagnosis.
- Understanding these imaging patterns is essential for pediatric neuro-oncologists and neuroradiologists.
Abstract:
Pediatric brain tumors are the leading cause of death from solid tumors in childhood. The most common posterior fossa tumors in children are medulloblastoma, atypical teratoid/rhabdoid tumor, cerebellar pilocytic astrocytoma, ependymoma, and brainstem glioma. Location, and imaging findings on computed tomography (CT) and conventional MR (cMR) imaging may provide important clues to the most likely diagnosis. Moreover, information obtained from advanced MR imaging techniques increase diagnostic confidence and help distinguish between different histologic tumor types. Here we discuss the most common posterior fossa tumors in children, including typical imaging findings on CT, cMR imaging, and advanced MR imaging studies.
