"Eight-and-a-half" syndrome is "one-and-a-half" syndrome (conjugated horizontal 
gaze palsy and internuclear ophthalmoplegia) plus ipsilateral fascicular cranial 
nerve seventh palsy. This rare condition, particularly when isolated, is caused 
by circumscribed lesions of the pontine tegmentum involving the abducens 
nucleus, the ipsilateral medial longitudinal fasciculus, and the adjacent facial 
colliculus. Its recognition is therefore of considerable diagnostic value. We 
report a case of a 65-year-old man who presented with eight-and-a-half syndrome 
in which brain magnetic resonance imaging scan revealed a lacunar pontine 
infarction.