A patient with vestibular schwannoma is best investigated by which of the following:
SPECT
Contrast enhanced CT scan
Gadolinum enhanced MRI
PET scan
Vestibular schwannoma usually arises in VIII cranial nerve of posterior cranial fossa. CT scan will not give clear picture of posterior cranial fossa tumour < 2cm. MRI scan is the investigation of choice in patient with posterior cranial fossa tumour. Ref: Philippe Demaerel, (2001), Chapter 18, "Imaging of Intracranial Abnormalities in Neurofibramatosis type 1 & 2", In the book, "Recent Advances in Diagnostic Neuroradiology", Springer Publications, USA, Page 283