Absence of clavicle is a feature of:
a. Cleidocranial dysplasia(Ref: Nelson's 20/e p 618-619)Cleidocranial dysostosis, also called cleidocranial dysplasia or mutational dysostosis, is a hereditary congenital disorder, where there is delayed ossification of midline structures; Absent clavicles and delayed dentition.
Cleidocranial dysplasia
Multiple epiphyseal dysplasia
Fibrous dysplasia
Cranio-Metaphyseal dysplasia
Genetics And Genetic Disorders