Isolated Facial Nerve Palsy Due to Temporal Bone Metastasis

Isolated facial nerve palsy resulting from temporal bone metastasis is rare and has been sparsely reported in the literature to be the initial presentation of cancer. The most commonly reported sites of origin of such metastases include the breast, lung, kidney, gastrointestinal tract, larynx, prostate, and thyroid, to name a few. Here, we discuss a patient initially presenting with isolated lower motor neuron facial nerve palsy. The diagnosis was revised to that of breast cancer with metastasis to the temporal bone resulting in facial nerve paralysis following the subsequent clinical presentation.