title: Symptomatic and asymptomatic accessory navicular bones: findings of Tc-99m MDP bone scintigraphy.
abstract: OBJECTIVE
  The accuracy of bone scintigraphy in diagnosing symptomatic accessory navicular bones has not been well studied. We conducted a retrospective study to explore the results and use of scintigraphy in symptomatic and asymptomatic accessory navicular bones.
  
  
  METHODS
  Thirteen patients with a total of 13 symptomatic and 10 asymptomatic accessory navicular bones were included in the study. We used a scoring system to grade the scintigraphic abnormalities. The patients' symptoms and scintigraphic findings were recorded.
  
  
  RESULTS
  Though focally increased radiopharmaceutical uptake was observed in all symptomatic accessory naviculars, half of the asymptomatic accessory navicular bones had the same manifestations. The scoring system was of no value in differentiating symptomatic from asymptomatic accessory navicular bones.
  
  
  CONCLUSIONS
  Bone scintigraphy is a sensitive but not a specific tool for diagnosing a symptomatic accessory navicular.
authors.affiliation: Department Nuclear Medicine, National Cheng Kung University Hospital, Taiwan, R.O.C.
authors.forename: N T
authors.initials: NT
authors.lastname: Chiu
authors.forename: I M
authors.initials: IM
authors.lastname: Jou
authors.forename: B F
authors.initials: BF
authors.lastname: Lee
authors.forename: W J
authors.initials: WJ
authors.lastname: Yao
authors.forename: D G
authors.initials: DG
authors.lastname: Tu
authors.forename: P S
authors.initials: PS
authors.lastname: Wu
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D005532:Foot Deformities, Congenital / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013639:Tarsal Bones / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013669:Technetium Tc 99m Medronate
chemical_list: D019275:Radiopharmaceuticals; D013669:Technetium Tc 99m Medronate