Related Experiment Video
Updated: Jul 9, 2026

Array Comparative Genomic Hybridization Array CGH for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
Genetic variations in pseudoachondroplasia: a review of case reports
Lukasz Petryka1, Michal Ordak1
1Department of Pharmacotherapy and Pharmaceutical Care, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 Str, 02-097 Warsaw, Poland.
Introduction:
Pseudoachondroplasia is a rare and severe genetic disorder caused by a mutation in the COMP gene, making precise molecular diagnosis crucial for effective treatment. In the literature, case reports of patients with pseudoachondroplasia have consistently described novel mutations in the COMP gene.
Methods:
This study aimed to review these published articles. The description includes the mutation in the COMP gene; clinical symptoms; and the sex, age, and height of the individual with pseudoachondroplasia.
Results:
A review identified various point mutations, deletions, and insertions in the COMP gene that lead to pseudoachondroplasia by affecting the structure and function of the COMP protein.
Discussion:
Recent advancements in next-generation sequencing make it essential to use comprehensive genetic screening for bone disorders such as pseudoachondroplasia because this testing enables precise, cost-effective, and rapid mutation detection across multiple genes, improving diagnostic accuracy and supporting informed reproductive decisions and genetic counseling.
Related Concept Videos
Incomplete Dominance
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Comparing Copy Number Variations and SNPs
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Nondisjunction
Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Genetic Variation
Genes exist in different versions called alleles, which...

