Journal
JOURNAL OF MATERNAL-FETAL & NEONATAL MEDICINE
Volume 30, Issue 9, Pages 1041-1044Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14767058.2016.1199675
Keywords
Blomstrand; chondrodysplasia; sclerosing
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Blomstrand osteochondrodysplasia (BOCD) is a rare autosomal recessive sclerosing skeletal dysplasia characterized by accelerated chondrocyte differentiation. In this article, we discuss three cases where lethal skeletal dysplasia was suspected and Blomstrand dysplasia was diagnosed by autopsy. Antenatal ultrasound findings include increased nuchal translucency, tetramicromelia and polyhydramnios. Radiological hallmark is advanced skeletal maturation and bone sclerosis. Histology of long bones revealed narrow cartilagenous cap and changes in the physeal growth zone which showed severe hypoplasia and disorganization of proliferative phase and hypertrophic phase. Homozygous and compound heterozygous mutations in PTHR1 gene have been implicated in the pathogenesis of this chondrodysplasia.
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