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Perinatal Case of Fatal Simpson-Golabi-Behmel Syndrome with Hyperplasia of Seminiferous Tubules

Nives Zimmermann, Jerzy Stanek

(Department of Pathology, University of Cincinnati, College of Medicine, Cincinnati, OH, USA)

Am J Case Rep 2017; 18:649-655

DOI: 10.12659/AJCR.903964

BACKGROUND: Simpson-Golabi-Behmel syndrome (SGBS) is a rare X-linked recessive syndrome characterized by fetal overgrowth.
CASE REPORT: We present a case of a male infant with SGBS. Abnormal prenatal ultrasound (including congenital diaphragmatic hernia) prompted microarray testing of amniotic fluid cells, which showed deletion on chromosome Xq26.2 affecting the glypican-3 gene consistent with SGBS type I. The infant died six hours after birth and at autopsy showed features of SGBS, including macrosomia, organomegaly, diaphragmatic hernia with consequent pulmonary hypoplasia, cleft palate, large tongue with a midline groove, a supernumerary nipple, Meckel’s diverticulum, and abnormal phalanges. Additionally, we observed features that have previously not been described in SGBS, including testes with hyperplastic seminiferous tubules and Mullerian remnants, and placenta with incipient fetal thrombotic vasculopathy.
CONCLUSIONS: While most patients with SGBS type I survive into childhood or even adulthood, the severe course in our patient was ascribed to pulmonary hypoplasia secondary to the bilateral diaphragmatic hernia.

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