Isolated Pupil-Dilated Painful Third Nerve Palsy as an Initial Presentation of Systemic Lymphoma

"The rule of pupil" has implied that pupil-dilated third nerve palsy is usually due to the compressive lesion, and pupil-sparing, an ischemic metabolic or noncompressive, reversible lesion. This notation is challenged in some condition of pupil-dilated third nerve palsy with systemic lymphoma