Masquerading Superior Oblique Palsy.

ABSTRACT:

Purpose

We evaluated patients with hypertropia compatible with a diagnosis of superior oblique (SO) palsy to ascertain whether the 3-step test (3ST) can distinguish SO atrophy characteristic of trochlear nerve pathology from masquerading conditions.

Design

Prospective cross-sectional study.

Methods

In an academic practice, we performed quasi-coronal plane, surface coil magnetic resonance imaging in 83 patients clinically diagnosed with SO palsy. We evaluated alignment, SO cross-sectional area, SO contractility, and rectus muscle pulley positions.

Results

A total of 57 patients with mean age 39 years (SD = 21 years) had unilateral SO palsy manifested by SO atrophy (22 congenital and 35 acquired). There was normal SO size in 26 patients with an average age of 39

SUBMITTER: Demer JL 

PROVIDER: S-EPMC9991863 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature