infratentorielle Tumoren

Pilocytic

astrocytoma - MRI appearance. MRI T2W axial image shows a well-defined hyperintense lesion with inner hypointense area noted in left cerebellum. The lesion shows mild perilesional oedema and causes compression over 4th ventricle resulting in mild hydrocephalus.

Cerebellar

pilocytic astrocytoma: MR spectroscopy. Shows cystic lesion with eccentric enhancing mural nodule in posterior fossa

Cerebellar

pilocytic astrocytoma: MR spectroscopy. T1WI shows hypointense lesion in the posterior fossa

Cerebellar

pilocytic astrocytoma: MR spectroscopy. T2WI shows hyperintense lesion in posterior fossa with effaced 4th ventricle and triventricular hydrocephalus with eccenteric intermediate signal intensity solid component.

Cerebellar

pilocytic astrocytoma: MR spectroscopy. Post contrast T1WI shows peripheral enhancing cystic lesion with eccentric mural nodule.

Cerebellar

pilocytic astrocytoma: MR spectroscopy. MRS shows laclate doublet at 1.3ppm and elevated CHO peak at 3.2ppm and reduced NAA peak and increase cho/Cr and cho/NAA ratio.

Verkalktes

Meningeom rechts infratentoriell (nicht histologisch bestätigt). Links im Fenster für das Hirnparenchym, rechts Knochenfenster.

Tumor-to-tumor

metastases in Cowden’s disease: an autopsy case report and review of the literature. MRI findings in cerebellar dysplastic gangliocytoma. T1 (a) and T2 (b) weighted magnetic resonance images of the head. A striped pattern is seen in the right hemisphere of the cerebellum (arrowheads). The cerebral aqueduct is compressed

Embryonal

tumor with multilayered rosettes. Infratentorial midline tumour affecting the cerebellum and filling the fourth ventricle. The lesion is solid and hyperattenuating, with punctate calcifications and discrete cystic foci.