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Visualizing skull in prenatal mice with syndromic craniosynostosis

Crouzon syndrome is characterized by premature fusion of multiple cranial sutures and profound facial dysmorphology. Improved treatment requires better understanding of the mechanisms of malformation. This study quantifies the progression of cranial dysmorphology in the Fgfr2+/C342Y mouse model of Crouzon syndrome. Samples of affected and wild‐type littermates were obtained at six developmental time points: E15.5, E17.5, P1, P7, P14, and adult. 3D reconstructions of the skull were created from microCT images using density thresholds. However, as this technique is dependent on the ossification of bone, and dysmorphology may arise earlier in development, we applied a novel method that allows us to visualize developing cranial tissues. Specifically, E15.5 samples were treated with radioopaque stain prior to microCT imaging, and cranial primordia were segmented manually. Morphometric analysis (EDMA) was used to compare shape of affected and wild‐type samples at each time point.