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Novel TSEN54 mutation causing pontocerebellar hypoplasia type 4.
Rudaks L.I., Moore L., Shand K.L., Wilkinson C., Barnett C.P.
Pontocerebellar hypoplasia exhibits a diverse range of etiologies, including six known autosomal recessive, single gene disorders. We describe a molecularly confirmed case of pontocerebellar hypoplasia type 4, a rare and severe neonatal phenotype with a novel TSEN54 mutation, presenting with polyhydramnios, hypertonia, and early neonatal death. The patient manifested severe hypoplasia of the cerebellum and brainstem. The neuropathologic findings in pontocerebellar hypoplasia type 4 develop late in gestation, and therefore prenatal diagnosis with ultrasonography is of limited use. Establishing a molecular diagnosis in the proband is critical for allowing couples to plan future pregnancies.