Central Serous Chorioretinopathy Following Corticosteroid Injection for Thumb Carpometacarpal Osteoarthritis: A Case Report

Introduction: Central serous chorioretinopathy (CSC) is a chorioretinal disorder characterized by the accumulation of subretinal fluid and is often associated with corticosteroid exposure. While well-recognized in ophthalmology, awareness of CSC remains limited among musculoskeletal specialists, especially following intra-articular injection of the small joints of the upper extremity. Case Report: We report the case of a 58-year-old female treated for left thumb carpometacarpal joint osteoarthritis. Following a second intra-articular injection of triamcinolone acetonide, she developed acute unilateral visual impairment. Ophthalmologic examination confirmed serous detachment of the neurosensory retina, leading to a diagnosis of CSC. The patient later revealed a history of a transient visual episode during a previous stressful period, suggesting a predisposition to the condition. The subretinal fluid resolved over 6 weeks with conservative management. Conclusion: This case highlights the systemic risks of local corticosteroid injections. Even small doses used in small joint osteoarthritis can precipitate CSC, particularly in susceptible individuals. Clinicians should recognize this potential complication to ensure prompt diagnosis and appropriate counseling.