Nasal glial heterotopia. A: Coronal reconstruction of a spiral CT scan. A soft tissue mass is visible in left nasal cavity. Note the incomplete ossification of the skull base (arrow) at the age of 48 days. Ossification is regularly completed in this area at the age of 3 months. B: Sagittal T2 weighted MR image revealing an endonasal hyperintense mass without intracranial connection. C and D: axial T2 weighted and contrast-enhanced T1 weighted MR images showing a not contrast-enhancing mass in the nasal cavity. The rim-like contrast enhancement around the tumor is attributed to peritumoral mucosal swelling.
Arndt et al. Diagnostic Pathology 2008 3:14 doi:10.1186/1746-1596-3-14