A primigravid woman with polyhydramnios and preterm contractions presented at 25 weeks pregnancy. Fetal ultrasound revealed periventricular cysts and cerebral hypoplasia. The neonate was born in a... Show moreA primigravid woman with polyhydramnios and preterm contractions presented at 25 weeks pregnancy. Fetal ultrasound revealed periventricular cysts and cerebral hypoplasia. The neonate was born in a poor condition, with increased serum lactate and pyruvate levels. Whole exome sequencing detected FBXL4 gene mutations causing recessive mitochondrial myopathy. Show less