A permeative pattern to the body the sphenoid bone shown, extending dorsally, and into the pituitary fossa. This is contiguous with a 2 cm mass filling the body of the sphenoid, with either calcified or ossified matrix. No other destructive lesion is shown. Ventricles and sulci within normal. Ossification of the falx is incidentally noted. The right mastoid air cells are opacified.