Fig. 9
From: Masses of developmental and genetic origin affecting the paediatric craniofacial skeleton
Nasal dermoid sinus cyst (NDSC) visible since birth in a 15-year-old boy. a Sagittal contrast-enhanced CT scan (soft tissue windows) shows the extra- and intracranial dermoid cysts (white arrows), which connect with each other via the abnormal foramen caecum (black arrow). b High-resolution sagittal T2 shows that the cystic lesions have different signal intensities (arrows), suggesting different proteinaceous/lipomatous contents. Note also corpus callosum agenesis and posterior ethmoidal meningocele (asterisk). c The lipomatous content (arrowheads) of the NDSC appears hyperintense on T1 (upper image part) and hypointense on fat-saturated contrast-enhanced T1 (lower image part), respectively