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An enormous difficulty lies in classifying an astroblastoma tumor due to its overlapping features with other brain tumors. Certain neuroradiologic features finally distinguish astroblastoma from the common ependymoma, another frequent tumor occurring in the fourth ventricle. In general, when brain lesions are smaller than Grade I, demarcating between these features is near impossible, often mistaking astroblastoma with glial neoplasms, high-grade astrocytes, and embryonal neoplasms. However, the “bubbly” appearance in astroblastoma is entirely exclusive.^{[citation needed]}

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