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High-frequency ultrasonography findings in persistent hyperplastic primary vitreous
L D Mackeen1, K K Nischal, W C Lam
1Department of Ophthalmology, The Hospital for Sick Children, Toronto, Ontario, Canada.
Summary
High-frequency ultrasonography effectively identifies key features of persistent hyperplastic primary vitreous (PHPV). This imaging technique reveals a thickened anterior hyaloid face, aiding in understanding surgical complications.
Area of Science:
- Ophthalmology
- Medical Imaging
Background:
- Persistent hyperplastic primary vitreous (PHPV) is a congenital condition affecting the eye.
- Accurate diagnosis is crucial for appropriate management and to anticipate potential complications.
Purpose of the Study:
- To identify specific anatomic features of PHPV using high-frequency ultrasonography.
- To correlate ultrasound findings with intraoperative observations in PHPV eyes.
Main Methods:
- High-frequency ultrasonography was employed on three groups: newly diagnosed PHPV, surgically treated PHPV, and a control group.
- B-scan ultrasonography and intraoperative findings were also documented for PHPV patients.
Main Results:
- Characteristic PHPV features like dragged ciliary processes and anteriorly displaced lens were visualized.
- A novel finding of a double linear echo in the pars plana/plicata region was observed exclusively in PHPV eyes.
- This echo was confirmed intraoperatively as a thickened adherent anterior hyaloid face.
Conclusions:
- High-frequency ultrasound is a reliable tool for diagnosing PHPV.
- The thickened anterior hyaloid face identified may explain surgical complications such as retinal tears and detachments.