Related Experiment Video
Updated: Aug 11, 2026

Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage
Published on: October 21, 2015
Pycnodysostosis associated with bilateral congenital pseudarthrosis of the clavicle
Lokman Karakurt1, Erhan Yilmaz, Oktay Belhan
1Department of Orthopaedic Surgery, Firat University Hospital, 23200 Elazig, Turkey. lkarakurt@hotmail.com
Abstract:
We report the case of a 22-year-old woman with pycnodysostosis associated with bilateral congenital pseudarthrosis of the clavicle. The patient was first seen at the age of 19 years and had no symptoms during the 3-year follow-up period. The diagnosis of pycnodysostosis was made by typical clinical and radiological findings. Bilateral painless mid-clavicular mass and plain radiograms confirmed the diagnosis of bilateral congenital pseudarthrosis of the clavicle. Surgery was not performed for pseudarthrosis of the clavicles, just observation was preferred.
More Related Videos
08:22A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
Published on: December 1, 2017
08:03Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Related Concept Videos
Nondisjunction
Bones of the Upper Limb: Radius
The radius has a nail-shaped head, and a short...
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...
Development of the Limb Synovial Joints
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Bone Formation by Endochondral Ossification
Flail Chest-I
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
Pathophysiology
The pathophysiology of flail chest is complex, involving fractures of...