A rare case of intraosseous lipoma involving the sphenoclival region.

ABSTRACT

We describe the case of a 23-year-old man whose CT scan revealed a hypodense lesion reshaping the superior and middle third of the clivus and partially invading the sphenoidal sinus. MRI showed an irregular-shaped lesion occupying the body of the sphenoid bone, involving the superior and middle third of the clivus and sprouting into the sphenoid sinus. The lesion was hyperintense on T1- and T2-weighted sequences with a thin peripheral rim of hypointensity, without enhancement after i.v. gadolinium injection. The pathology report confirmed an intraosseus lipoma. Intraosseous lipomas involving the spheno-clival region are extremely rare. CT and MRI scan interpretation can be troublesome but this rare pathology has to be considered in the differential diagnosis.