Examination of anterior proliferative vitreoretinopathy with ultrasound biomicroscopy

Objective: To diagnose anterior proliferative vitreoretinopathy (a-PVR) with ultrasound biomicroscopy (UBM).

Methods: The UBM images of 27 cases (27 eyes) of suspicious a-PVR from cases with retinal detachment with PVR were analyzed and compared with the images of B scan ultrasound and the findings during vitrectomy.

Results: UBM diagnosis of a-PVR was found in 20 eyes with retinal circumferential contraction, and in 15 eyes with retinal anterior displacement. A-PVR was not diagnosed by UBM in 7 eyes. UBM images of a-PVR included: the pattern of dots and cords in vitreous proliferation, the echo augmentation and obvious central displacement of the retina with circumferential contraction. Besides, the trough, "angle" and "Z" shaped overlap of the retina were the characteristics of the retinal anterior displacement.

Conclusions: UBM plays an important role in the clinical diagnosis of a-PVR.