Perineural Spread of Cutaneous Squamous Cell Carcinoma Manifesting as Ophthalmoplegia.

An 89-year-old female presented with horizontal diplopia and was diagnosed with VI nerve palsy attributed to a microvascular event. She subsequently progressed to develop an orbital apex syndrome, with neuroimaging demonstrating tumour invasion. Eighteen months earlier, she had squamous cell carcinoma of the forehead excised with clear margins.