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Pineocytomas are predominantly smaller,round,hypodense,homogeneous masses with calcifications,particularly peripheral.They enhance heterogeneously on CT and present with a lesser degree of hydrocephalus in older patients. Pineoblastomas,on the other hand,are larger,lobulated,homogeneous tumours, are infrequently calcified,and present with a greater degree of hydrocephalus,often in young females.They tend to be hyperdense on CT and hypo-to isointense on T1-weighted images and enhance homogeneously on CT and heterogeneously on MRI. |
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