Unilateral mydriasis due to scopolamine patch

Case We report the case of a patient who presented with unilateral mydriasis after a scopolamine patch application. The specific clinical context (cancer) reported here may have led to the misinterpretation of the etiology of mydriasis. Conclusion Our case description warns against diagnostic mistakes related to this side effect and highlights the advantages of pilocarpine test in the differential diagnosis of unilateral mydriasis.