Significance of a hot spot on the bone scan after carpal injury--evaluation by computed tomography.
The use of bone scintigraphy in patients with negative radiographs after carpal injury is widely advocated. However, focally increased activity on the bone scan in the scaphoid or other carpal bones cannot always be radiologically confirmed as a fracture. To confirm scintigraphically suspected carpal fractures, computed tomography (CT) of the wrist was performed in patients with clinically suspected scaphoid fracture and initially negative radiographs. All patients underwent plain radiography, bone scintigraphy and CT. The combination of plain radiographs and CT, as judged by a panel of experienced observers, was used as the reference standard. In 18 patients, 21 out of 22 carpal hot spots on bone scintigraphy could be radiologically confirmed as a fracture. The diagnosis was missed by CT scan in three patients with proven fractures on plain radiographs. We conclude that, in patients with negative initial radiographs following carpal injury, a positive bone scan must be interpreted as a fracture.
Tiel-van Buul
M M
MM
Department of Nuclear Medicine, University of Amsterdam, The Netherlands.
van Beek
E J
EJ
Dijkstra
P F
PF
Bakker
A J
AJ
Broekhuizen
T H
TH
van Royen
E A
EA
D000328:Adult; D002348:Carpal Bones / Q000000981:diagnostic imaging / Q000293:injuries*; D005260:Female; D050723:Fractures, Bone / Q000000981:diagnostic imaging* / Q000453:epidemiology; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity; D013669:Technetium Tc 99m Medronate; D014057:Tomography, X-Ray Computed
D013669:Technetium Tc 99m Medronate