title: Small calvarial bone scan foci--normal variations.
abstract: In a series of 3,000 bone scans reviewed retrospectively 21 (0.7%) small calvarial foci were observed. Seventeen of these lesions were found along skull suture lines. No evidence for metastatic disease could be found. Skull radiographs were normal and follow-up bone scans demonstrated no change in the size or location of the lesion. These intense calvarial foci are thought to represent normal variations; among the possibilities are subradiographic cartilaginous rests, sutural foramina, or enlarged Pacchionian granulations.
mesh_terms: D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D011877:Radionuclide Imaging; D012886:Skull / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D012888:Skull Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000556:secondary; D013669:Technetium Tc 99m Medronate
chemical_list: D013669:Technetium Tc 99m Medronate