Contralateral trigeminal neuralgia as a false localizing sign in calcified chronic subdural hematoma: a case report.

A case of trigeminal neuralgia caused by a contralateral calcified chronic subdural hematoma is reported. Preoperative magnetic resonance imaging revealed rotational displacement of the pons caused by huge chronic subdural hematoma. The neuralgia was completely alleviated after removal of the hematoma. The clinical and radiological features are described, and the possible mechanism of the neuralgia is briefly discussed.