“ This is a rare, autosomal dominant condition that affects membranous bone formation and causes delayed ossification of midline structures....
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This is a rare, autosomal dominant condition that affects membranous bone formation and causes delayed ossification of midline structures. It is associated with short stature, delayed closure of cranial sutures, clavicular dysplasia and dental abnormalities. The clavicles and pubic symphysis are formed from membranous bone.
CHEST X-RAY
• Absent or hypoplastic lateral clavicles
• Supernumerary ribs (e.g. 13 ribs)
• Narrowed thorax
PELVIS X-RAY
• Hemivertebrae
• Widened pubic symphysis
APPENDICULAR X-RAYS
• Absent or short radius
• Elongated second metatarsals and metacarpals and large MCP/metatarsophalangeal (MTP) pseudoepiphyses
SKULL X-RAY
• Multiple wormian bones
• Delayed closure of sutures, widened anterior fontanelle and cranial enlargement
• Large mandible
• Small paranasal sinuses
• Hypertelorism
Cleidocranial dysostosis. Frontal chest radiograph demonstrating absent clavicles.
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