system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Clavicle is absent in:
assistant
The correct answer is  Cleidocranial Dysplasia
(Marie and Sainton’s disease, Scheuthauer-Marie-Sainton syndrome, mutational dysostosis).
A congenital disorder of bone formation manifested with clavicular hypoplasia or agenesis with a narrow thorax, which allows approximation of the shoulders in front of the chest.