Type III uveal effusion syndrome suspected to be related to pachychoroid spectrum disease: A case report.

INTRODUCTION We report a case of type III uveal effusion syndrome (UES) suspected to be related to pachychoroid spectrum disease. PATIENT CONCERNS A 42-year-old man became aware of visual field constriction and deterioration of visual acuity in his right eye. DIAGNOSIS Upon examination, a bullous non-rhegmatogenous retinal detachment was observed in the inferior 2 quadrants of the right eye fundus, and the subretinal fluid moved with postural changes. The axial length in that eye was 22.36 mm, thus indicating no nanophthalmia. Preoperative indocyanine green angiography revealed dilated choroidal vessels in the posterior pole of the right eye and mild leakage in the late phase. Optical coherence tomography examination revealed choroidal thickening in both eyes. INTERVENTIONS For treatment, we first performed sclerotomy, and the intraoperative findings showed no thickening of the sclera. Following surgery, reattachment of the retina was not achieved. OUTCOMES Thus, we next performed vitrectomy, which led to successful reattachment of the retina. LESSONS In this case, we theorize that pachychoroid spectrum disease might have been involved in the pathogenesis of type III UES.