Abstract
We present an unusual case of a metastatic renal cell carcinoma (RCC) mimicking trigeminal
schwannoma. The patient, with no prior history of RCC, presented with clinical symptoms
and imaging consistent with trigeminal neuralgia secondary to trigeminal schwannoma.
Magnetic resonance imaging of the brain showed a large bilobed cystic/solid mass primarily
in the cerebellopontine angle cistern, with extension into the left middle cranial
fossa, Meckel cave, and left cavernous sinus. Following surgical excision, histopathology
revealed the tumor to be an RCC infiltrating into the trigeminal nerve fascicles.
Further imaging and investigation revealed widespread metastasis to the vertebral
bodies and long bones. Metastatic RCC to the trigeminal nerve is rare. Despite the
development of more effective treatment modalities, the prognosis of metastatic RCC
remains poor. To our knowledge, this is the first reported case of RCC metastasizing
to the trigeminal nerve fascicles.
Keywords
metastatic renal cancer - renal cell carcinoma - trigeminal schwannoma - trigeminal
neuralgia - cerebellopontine angle