title: Frontal lucency sign on brain scans.
mesh_terms: D001927:Brain Diseases / Q000175:diagnosis*; D001932:Brain Neoplasms / Q000175:diagnosis; D002318:Cardiovascular Diseases / Q000175:diagnosis; D005625:Frontal Lobe; D006801:Humans; D011877:Radionuclide Imaging; D013667:Technetium
chemical_list: D013667:Technetium