title: Bilateral fused os intermetatarseum presenting as dorsal foot pain: a case report.
abstract: OBJECTIVE
  Os intermetatarseum is a rare accessory bone of the forefoot and usually situated between the base of the first and second metatarsals. Most of the cases are asymptomatic and diagnosed incidentally. Here, we report a rare form of os intermetatarseum presented with bilateral dorsal foot pain and to the authors' knowledge, it is the first case which includes computerized tomography (CT) and magnetic resonance imaging (MRI) findings.
  
  
  METHODS
  A 23-year-old male complained of localized bump at the dorsum of the both feet underwent bilateral anteroposterior foot radiograms which was unremarkable and then CT and MRI were performed.
  
  
  RESULTS
  MRI of both feet demonstrated osseous structures in relation with medial os cuneiforme. Computerized tomography demonstrated bilateral os intermetatarsea fused with medial os cuneiforme.
  
  
  CONCLUSIONS
  It is important for radiologist to know that os intermetatarseum can be presented as dorsal foot pain. Due to its position, it is difficult to demonstrate os intermetatarseum in plain radiographs, CT and MRI should be performed in clinically suggestive cases.
authors.affiliation: Department of Radiology, Medical Faculty, Hacettepe University, 06100, Ankara, Turkey, ilgazcagatay174@hotmail.com.
authors.forename: Ilgaz Cagatay
authors.initials: IC
authors.lastname: Kose
authors.forename: Mustafa
authors.initials: M
authors.lastname: Hizal
authors.forename: Elif Gunay
authors.initials: EG
authors.lastname: Bulut
authors.forename: Eray
authors.initials: E
authors.lastname: Atli
authors.forename: Fatma Bilge
authors.initials: FB
authors.lastname: Ergen
mesh_terms: D006801:Humans; D008297:Male; D008682:Metatarsal Bones / Q000002:abnormalities* / Q000000981:diagnostic imaging; D010146:Pain / Q000209:etiology; D011859:Radiography; D055815:Young Adult
references.citation: Semin Musculoskelet Radiol. 2002 Jun;6(2):153-61
references.pmid: 12077704
references.citation: Acta Orthop Traumatol Turc. 2005;39(3):243-6
references.pmid: 16141731
references.citation: J Bone Joint Surg Br. 1963 Feb;45-B:117-21
references.pmid: 21125773
references.citation: Am J Phys Anthropol. 1998 Oct;107(2):199-209
references.pmid: 9786334
references.citation: Arch Orthop Trauma Surg. 2007 May;127(4):261-4
references.pmid: 16850328