Idiopathic Giant Retinal Cyst: A Case Report

Introduction: Idiopathic giant retinal cyst (IGRC) is a rare entity that may mimic a range of retinal or choroidal lesions. Accurate diagnosis and tailored surgical management are essential to achieve anatomical and functional outcomes. Case Presentation: We present the case of a 27-year-old female with decreased vision in the left eye due to a large intraretinal cyst. Multimodal imaging including optical coherence tomography, fluorescein angiography, and B-scan ultrasonography confirmed an intraretinal macrocyst. The patient underwent pars plana vitrectomy with retinotomy and cyst resection. Despite multiple reoperations for recurrent detachment, final best-corrected visual acuity stabilized at 2/50. Conclusion: IGRC is an uncommon condition. Surgical management, including cyst resection and vitrectomy, may restore anatomy, although functional prognosis is limited in chronic cases with macular involvement. Multimodal imaging plays a crucial role in differentiating IGRC from other mimicking entities.