Technique: Multiplanar, multisequence imaging has been obtained through the brain including pre and post contrast sequences.
Findings: Centred within the left inferior posterior cranial fossa, just to the left of the midline, there is a 27 mm ( craniocaudal ) x 23 mm ( AP ) x 19 mm mass which is of predominantly low signal intensity on T2-weighted imaging and isointense to grey matter on T1-weighted imaging. There is also low GRE signal. The mass demonstrates peripheral enhancement with some internal enhancing nodules mainly superiorly. The outline of the mass is slightly lobulated. There is mass effect with vasogenic oedema, effacement of the cerebellar folia, mild compression of the fourth ventricle; however there is no evidence of obstructive hydrocephalus at this time.
No supratentorial mass is identified.
There is a small number of scattered FLAIR signal intensity within the white matter of cerebrum. Normal grey-white matter differentiation in the cerebrum. No restricted diffusion. Ventricles and basal cisterns are within normal limits.
Conclusion: Solitary left posterior cranial fossa mass compatible with a haemorrhagic metastasis. Primary brain neoplasm is a possibility considered less likely.