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Medulloblastoma with excessive nodularity: radiographic features and pathologic correlate
L A Yeh-Nayre1, D M Malicki, D N Vinocur
1The Department of Pediatrics, University of California San Diego and Rady Children's Hospital, 3020 Children's Way, San Diego, CA 92123, USA.
Case Reports in Radiology
|November 8, 2012
Summary
Medulloblastoma with extensive nodularity, a rare childhood brain tumor subtype, presents unique imaging features. Early recognition of this specific medulloblastoma is crucial for appropriate treatment planning and potentially less aggressive management due to its favorable prognosis.
Area of Science:
- Pediatric Oncology
- Neuroradiology
- Neuro-oncology
Background:
- Medulloblastoma is the most common malignant brain tumor in children.
- Medulloblastoma with extensive nodularity (MBEN) is a rare subtype with a generally favorable prognosis.
- Accurate preoperative diagnosis of MBEN is essential for guiding treatment strategies.
Purpose of the Study:
- To report a case of medulloblastoma with extensive nodularity in a pediatric patient.
- To highlight the characteristic neuroradiographic features of this rare medulloblastoma subtype.
- To emphasize the clinical significance of identifying MBEN for treatment decisions.
Main Methods:
- Case report of a 10-month-old female with a posterior fossa tumor.
- Detailed analysis of magnetic resonance imaging (MRI) findings, including diffusion-weighted imaging (DWI) and post-gadolinium contrast enhancement.
- Histopathological confirmation of the diagnosis.
Main Results:
- The patient presented with a posterior fossa tumor exhibiting excessive nodularity.
- MRI revealed decreased diffusivity on DWI and distinct grape-like postcontrast enhancement.
- Histopathology confirmed the diagnosis of medulloblastoma with extensive nodularity.
Conclusions:
- This case underscores the importance of recognizing the unique neuroradiographic signature of medulloblastoma with extensive nodularity.
- Preoperative identification of MBEN can influence therapeutic decisions, potentially allowing for less aggressive management due to its favorable prognosis.
- Radiological-pathological correlation is key in diagnosing rare pediatric brain tumor subtypes.
