Cranial nerve involvement by metastatic cancer
INTRODUCTION This chapter will cover the topic of metastatic cancer affecting the cranial nerves outside of the central nervous system proper. This focuses our interest on extradural involvement by cancer. Cranial nerve disorders related to carcinomatous meningitis are covered separately. It also leads us away from a discussion of meningiomas and primary nerve sheath tumors, principally schwannomas, which represent a substantial component in the clinical realm of tumor-related cranial neuropathies.