Type:
Educational Exhibit
Keywords:
Neoplasia, Contrast agent-intravenous, MR, CT, Paediatric, Oncology, Head and neck
Authors:
E. Garcia Martinez1, D. H. Jiménez1, L. Navarro Vilar2, C. P. Fernandez Ruiz1, M. Atares 3, F. Menor1; 1VALENCIA/ES, 2Valencia, Va/ES, 3Picaña, Valencia/ES
DOI:
10.1594/ecr2013/C-2220
Imaging findings OR Procedure details
The pons is enlarged Fig. 1,with the basilar artery are displaced anteriorly against the clivus and potentially engulfed Fig. 6.The floor of the fourth ventricle is flattened Fig. 5 and obstructive hydrocephalus may be present.
Occasionally the tumour is exophytic Fig. 6,
either outwards into the basal cisterns or centrally in the 4 ventricle.
Usually the tumour is homogenous pre-treatment,
however in a minority of patients areas of necrosis may be present.
The findings in CT:Typically hypodense Fig. 4,
with little if any enhancement and MR: T1 decreased intensity,T2:heterogeneously increased Fig. 5 T1C: usually minimal enhance (can enhance post radiotherapy),DWI:usually no restricted,occasionally mildly restricted.
Fig. 3