Joubert's syndrome is an autosomal-recessive condition characterized by dys
genesis of the cerebellar vermis, hypotonia, developmental delay, a respira
tory pattern of alternating tachypnea and apnea, and abnormal eye movements
. Radiologic findings include a midline cerebellar cleft in place of the ve
rmis and a characteristic shape of the fourth ventricle, Prenatal hydroceph
alus has been proposed as a possible etiology for the cerebellar abnormalit
ies but has not previously been described in association with this syndrome
. The authors report a patient with clinical and radiographic features cons
istent with Joubert's syndrome who presented with congenital hydrocephalus,
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