Facial Paralysis Revealing an Atypical Metastasis of Breast Cancer

Facial paralysis has many etiologies, the most frequent is the idiopathic cause, which is a diagnosis of elimination, then infectious, traumatic, and tumoral causes, dominated by the parotid tumor. Breast cancer rarely gives a perineural metastasis, estimated at 0.6%, of all secondary localizations, with a suggestive clinical presentation, especially the slow and progressive mode of appearance, the involvement of multiple cranial nerves, recurrent paresis, and a history of cancer. Perineural metastases of breast cancer are rare, but can occur, and this case demonstrates that any symptomatology in the patient with breast cancer must be considered in the overall context.