47 Slide 47 shows a meningioma invading the overlying bone. They are usually benign but, as you can see in 47, locally invasive. Bone invasion is not a sign of malignancy in the case of meningioma. 49 Slide 48 shows a tumor at the cerebellar-pontine angle. It was attached to the 8 th cranial nerve.
Neurofibromatosis is the correct response.
Slide 49 shows a patient with neurofibromatosis with extensive paraspinal neurofibroma. How do you distinguish schwannoma from neurofibroma. What other lesions do patients with this disorder manifest. Slide 51 displays a colloid cyst. These are always in this location and no where else.