MR imaging abnormalities in congenital or developmental neuropathic strabismus

MR Imaging FindingsNumber of Patients (n = 112)
Ocular motor nerve abnormalities98 (88%)
    CNIV aplasia71 (63%)
    CNVI aplasia or hypoplasia23 (21%)
    CNIII aplasia or hypoplasia3 (3%)
    Combined CNIII hypoplasia and CNVI aplasia1 (1%)
Orbital abnormalities9 (8%)
    Superior oblique hypoplasia4 (4%)
    Medial rectus hypoplasia1 (1%)
    Inferior rectus hypoplasia1 (1%)
    Lateral rectus hypoplasia1 (1%)
    Superior rectus hypertrophy1 (1%)
    Fibrotic mass1 (1%)
Brain abnormalities5 (4%)
    Periventricular leukomalacia4 (4%)
    Periventricular heterotopia1 (1%)