Combined 50- and 20-MHz frequency ultrasound imaging in intermediate uveitis.

PURPOSE

To evaluate the information provided by multifrequency ultrasound examination in patients with intermediate uveitis.

DESIGN

Prospective observational case series.

METHOD

High-resolution ultrasonography with 50- and 20-MHz frequency immersion probes was performed in seven eyes of five young patients with clinical diagnosis of intermediate uveitis.

RESULTS

Exudative material over the inferior pars plana and peripheral retina (snowbank) was found in all eyes with 50- and 20-MHz probe, although resolution of the latter was poorer. The 50-MHz imaging was superior for visualization of angle structures and details of pars planitis; the anterior vitreous involvement and cyclitic bands were better shown with the 20-MHz probe, which could also evidence cystoid macular edema.

CONCLUSIONS

Ultrasound examination with both 50- and 20-MHz frequency probes can detect the typical snowbank in intermediate uveitis and be useful in eyes with small pupil, dense vitreitis, or both, especially before pars plana vitrectomy or cataract surgery.