Parietal Bossing

Frontal Bossing

Figure 2.20. Radiograph of the chest shows the absence of the clavicles.

Figure 2.19. The same infant as in Figure 2.18 with cleidocranial dysplasia showing the approximation of the shoulders in front of the chest due to the absence of the clavicles. These infants present with other findings. Aplasia or defective development of the clavicles and laxity of the ligaments allow the forward folding of the shoulders. Defective mineralization of other parts of the skeleton may occur.

Figure 2.20. Radiograph of the chest shows the absence of the clavicles.

2.21

Frontal And Parietal Bossing

Figure 2.21. This figure shows the same infant with frontal and parietal bossing. The face appears small with a broad nose and depressed nasal bridge, and there is a groove over the metopic suture. The infant also had a large, open fontanelle.

Parietal Bossing
Figure 2.22. The same infant showing the brachycephalic skull and frontal and parietal bossing.

2.22

Wide Open Frontal

Figure 2.23. The radiograph of die skull in die same infant. Note the wide open fontanelles due to their delayed closure. There is also marked widening of the cranial sutures.

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