title: Asteroid Hyalosis: A Mimic of Vitreous Hemorrhage on Point of Care Ultrasound.
abstract: Point of care ultrasound in the emergency department (ED) is increasingly being used to diagnose time-sensitive, vision-threatening conditions. We present a case of a 64-year-old female who presented to the ED with a three-day history of worsening left eye floaters. Point of care ocular ultrasound demonstrated a posterior chamber containing many echogenic opacities of varying size without acoustic shadowing. Movement of the eye resulted in significant after-movement of these opacities, giving the classic "washing machine" appearance seen with vitreous hemorrhage (VH). Based on these ultrasound findings, the patient was diagnosed with a VH and was referred to ophthalmology. The consulting ophthalmologist ultimately diagnosed the patient with asteroid hyalosis without VH. Asteroid hyalosis is a benign condition of the vitreous resulting in calcium phosphate and lipid deposits that can mimic more serious VH on point of care ultrasound. Knowledge of this mimic is helpful for communication with specialists and for awareness of the potential for misdiagnosis with ocular ultrasound.
authors: *Department of Emergency Medicine,University of British Columbia,Vancouver,BC.
authors: Charles E A
authors: CEA
authors: Stringer
authors: *Department of Emergency Medicine,University of British Columbia,Vancouver,BC.
authors: Justin S
authors: JS
authors: Ahn
authors: *Department of Emergency Medicine,University of British Columbia,Vancouver,BC.
authors: Daniel J
authors: DJ
authors: Kim
mesh_terms: D003937:Diagnosis, Differential; D004636:Emergency Service, Hospital; D005128:Eye Diseases / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D019095:Point-of-Care Systems; D014463:Ultrasonography / Q000379:methods*; D014822:Vitreous Body; D014823:Vitreous Hemorrhage / Q000000981:diagnostic imaging
keywords: asteroid hyalosis; posterior vitreous detachment; retinal detachment; ultrasound; vitreous hemorrhage