Achondrogenesis type 1A: clinical, histologic, molecular, and prenatal ultrasound diagnosis
Received 16 November 2017
Accepted for publication 21 January 2018
Published 25 May 2018 Volume 2018:11 Pages 69—73
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Colin Mak
Peer reviewer comments 2
Editor who approved publication: Prof. Dr. Martin H. Maurer
Sara Vanegas,1 Luz Fernanda Sua,2 Jaime López-Tenorio,3 Diana Ramírez-Montaño,1 Harry Pachajoa1,4
1Department of Basic Medical Sciences, Center for Research on Congenital Anomalies and Rare Diseases (CIACER), Universidad Icesi, Cali, Colombia; 2Department of Pathology and Laboratory Medicine, Fundación Valle del Lili, Cali, Colombia; 3Department of Obstetrics and Perinatology, Fundación Valle del Lili, Cali, Colombia; 4Department of Pediatric Medical Genetics, Fundación Valle del Lili, Cali, Colombia
Background: Achondrogenesis type IA (ACG1A) is a rare, lethal autosomal recessive chondrodysplasia affecting endochondral bone ossification and differentiation, causing intrauterine growth restriction, narrow thorax, and short limbs. Mutations in TRIP11, which encodes Golgi microtubule-binding protein 210 in the Golgi apparatus, alter protein transport in tissues.
Case presentation: A 28-week gestation male fetus was diagnosed with ACG1A by clinical, radiological, histologic, and molecular findings.
Results: Whole exome sequencing was performed on fetal DNA and parental blood. Two fetal heterozygous novel variants of TRIP11, c.2304_2307delTCAA (p.Asn768Lysfs*7) and c.2128_2129delAT (p.lle710Cysfs*19), were inherited from the mother and father, respectively. Both variants created a reading frameshift leading to a premature stop codon and loss of protein function.
Conclusion: To our knowledge, this is the first Latin American report with clinical, radiographic, and molecular diagnosis of ACG1A. Clinical and molecular diagnosis in utero is essential for genotype–phenotype correlation and is useful for providing better genetic counseling.
Keywords: achondrogenesis type IA, endochondral bone, TRIP11, GMAP-210
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