Background: Intraosseous lipomatous lesions of the sphenoid bone and skull base are increasingly seen and cause a diagnostic challenge. The purpose of this study was to present the imaging findings of 4 patients with incidentally identified intraosseous lipomatous lesions within the sphenoid bone.
Methods: CT scans and MR images of 4 patients are shown. Macroscopic fat content of the lesions were evaluated by fat-saturated sequences on MRI and by measuring fat density in Hounsfield Units on CT.
Results: The most striking imaging findings of these well-defined lesions were their fat content, preservation of foramina, and absence of cortical destruction.
Conclusion: Intraosseous lipomatous lesions are asymptomatic, fat containing, non-touch lesions that should be recognized to prevent unnecessary further investigation, such as biopsy.
Keywords: CT; MRI; head and neck imaging; intraosseous lipoma; sphenoid bone.
© 2015 Wiley Periodicals, Inc.