PET/CT Characterization of Fibroosseous Defects in Children: 18F-FDG Uptake Can Mimic Metastatic Disease
Geoffrey S. Goodin1,2,
Barry L. Shulkin1,
Robert A. Kaufman1,2,3 and
M. Beth McCarville1,2
1 Division of Diagnostic Imaging, Department of Radiological Sciences, MS 210,
St. Jude Children's Research Hospital, 332 N Lauderdale St., Memphis, TN
38105-2794.
2 Department of Radiology, University of Tennessee Health Science Center,
Memphis, TN 38163.
3 Department of Pediatrics, University of Tennessee Health Science Center,
Memphis, TN 38163.

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Fig. 1A 6-year-old girl with 2.1-cm nonossifying fibroma of right
proximal tibial diametaphysis. Axial PET image shows mild 18F-FDG
uptake at location of nonossifying fibroma (arrow).
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Fig. 1B 6-year-old girl with 2.1-cm nonossifying fibroma of right
proximal tibial diametaphysis. Corresponding axial CT image shows nonossifying
fibroma (arrow).
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Fig. 2A 13-year-old boy with 3.2-cm nonossifying fibroma of left
distal femoral diaphysis. Axial PET image shows moderate 18F-FDG
uptake at location of nonossifying fibroma (arrow).
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Fig. 2B 13-year-old boy with 3.2-cm nonossifying fibroma of left
distal femoral diaphysis. Corresponding axial CT image shows nonossifying
fibroma (arrow).
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Fig. 2C 13-year-old boy with 3.2-cm nonossifying fibroma of left
distal femoral diaphysis. Anterior (C) and posterior (D) images
from technetium-99m methylene diphosphonate bone scintigraphy, which was
performed 1 week before PET/CT, show no activity at location of nonossifying
fibroma.
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Fig. 2D 13-year-old boy with 3.2-cm nonossifying fibroma of left
distal femoral diaphysis. Anterior (C) and posterior (D) images
from technetium-99m methylene diphosphonate bone scintigraphy, which was
performed 1 week before PET/CT, show no activity at location of nonossifying
fibroma.
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Fig. 3A 14-year-old boy with 2.9-cm nonossifying fibroma in left
femoral metaphysis. Axial PET image shows intense 18F-FDG uptake at
location of nonossifying fibroma (arrow).
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Fig. 4B 14-year-old boy with 2.9-cm nonossifying fibroma in left
femoral metaphysis. Corresponding axial CT scan shows nonossifying fibroma
(arrow).
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Fig. 5A 8-year-old boy with 1-cm cortical desmoid located at
posteromedial surface of distal femur. Axial PET image shows moderate
18F-FDG uptake at location of cortical desmoid
(arrow).
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Fig. 5B 8-year-old boy with 1-cm cortical desmoid located at
posteromedial surface of distal femur. Corresponding axial CT scan of cortical
desmoid (arrow).
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Copyright © 2006 by the American Roentgen Ray Society.