In Cleidocranial dysplasia, which of the following does NOT present as a feature?

Cleidocranial dysplasia is a genetic condition characterized by a variety of skeletal abnormalities, including particular features related to the skull and clavicles. One significant aspect of this condition is the defective formation of the clavicles, which can result in a narrow or absent clavicle, impacting the mobility of the shoulders.

The delayed closure of fontanelles is another hallmark of this condition. Fontanelles are the soft spots on a child's skull, and in cleidocranial dysplasia, they often remain open longer than usual, which can lead to further complications or delay in skull shape changes.

Additionally, delayed eruption of permanent teeth is commonly observed in individuals with this condition. This results from the abnormal dental development typically seen in cleidocranial dysplasia, leading to a prolonged time before teeth emerge.

However, retention of the maxilla is not a feature associated with cleidocranial dysplasia. In fact, individuals with this condition often experience various dental and craniofacial abnormalities that can include hypoplasia or other issues with the maxilla, but not retention. Therefore, while the other features listed are typical manifestations of cleidocranial dysplasia, the retention of the maxilla does not align with the characteristics