LEUKOCYTE-MARROW SCINTIGRAPHY IN HYPEROSTOSIS FRONTALIS INTERNA

Hyperostosis frontalis interna is the term used to describe the thicke ning of the frontal bones of the skull, This thickening of the frontal bones is accompanied by an increase in the diploic space which result s in an increased quantity of hematopoietically active marrow, Increas ed frontal bone uptake of labeled leukocytes has been reported in this condition, and the symmetric appearance of this activity may suggest its benign etiology, We have encountered a case of hyperostosis fronta lis interna in which the uptake of labeled leukocytes was asymmetric a nd marrow scintigraphy confirmed that the activity seen was due to mar row not infection.