EURORAD ESR

Case 4789

Osteoblastoma of the femur

Author(s)
D. Gurbuz, M. Ulusoy Haseki Hospital, Department of Radiology 34083- Istanbul/TURKEY
 
Patient
female, 29 year(s)
 
 
  • Figure 1
    Figure 1: X-ray of the left femur

    An AP X-ray showing an expansile,well-defined,eccentrically located radiolucent lesion in the proximal meta-diaphysis of the left femur surrounded by a thin rim of sclerosis.Note also small radiopacities within the...

     
     
     
  • Figure 2
    Figure 2: CT of the left proximal femur

    CT of the left proximal femur showing radiolucent,expansile lesion measuring approximately 2x2.5 cm,with the surrounding soft tissue edema or infiltration.Surrounding bone sclerosis and hyperdense components within...

     
     
     
  • Figure 3
    Figure 3: Bone scintigraphy

    Bone scintigraphy showing increased accumulation of the radionuclide at the site of the lesion.

     
     
     
  • Figure 4
    Figure 4: Axial T1WI MR

    Axial T1WI MR showing low to intermediate signal lesion of the left proximal femoral meta-diaphysis with peripheral hypointense rim corresponding to areas of sclerosis. Foci of signal void in the tumor likely...

     
     
     
  • Figure 5
    Figure 5: Axial fat-supressed T2WI MR

    Axial fat-supressed T2WI MR showing an inhomogeneous lesion with a mainly high signal intensity with an associated intra-articular fluid.Note the inflammatory edema type changes in the adjacent soft tissues.

     
     
     
  • Figure 6
    Figure 6a & b: A coronal STIR
     

    A coronal STIR image showing heterogeneous,mainly hyperintense lesion with intra-articular fluid.

     

    A coronal STIR image showing adjacent bone marrow edema.

     
     
     
  • Figure 7
    Figure 7: Axial contrast-enhanced T1WI MR

    Axial T1WI MR image after the administration of a gadolinium contrast medium showing marked enhancement of both the lesion itself and surrounding soft tissues.

     
     
     
  • Figure 8
    Figure 8: Coronal fat-supressed contrast-enhanced T1WI MR

    Coronal fat-supressed contrast-enhanced T1WI MR showing intra-articular fluid and marked enhancement of both the tumor and surrounding soft tissues.

     
     
     
  • Figure 9
    Figure 9: Microscopic examination

    Microscopic examination showing moderately thick,irregularly shaped trabeculae of woven bone with prominent osteoblastic rimming in a background of loose fibrovascular stroma.

     
     
     
An AP X-ray showing an expansile,well-defined,eccentrically located radiolucent lesion in the proximal meta-diaphysis of the left femur surrounded by a thin rim of sclerosis.Note also small radiopacities within the lesion.
 
CT of the left proximal femur showing radiolucent,expansile lesion measuring approximately 2x2.5 cm,with the surrounding soft tissue edema or infiltration.Surrounding bone sclerosis and hyperdense components within the lesion are seen. Note the anterior cortical disruption. Neighboring fatty planes were preserved.
 
Bone scintigraphy showing increased accumulation of the radionuclide at the site of the lesion.
 
Axial T1WI MR showing low to intermediate signal lesion of the left proximal femoral meta-diaphysis with peripheral hypointense rim corresponding to areas of sclerosis. Foci of signal void in the tumor likely represent internal matrix mineralization.We also monitor the changes in the anterior and posterior soft tissues of the lesion.
 
Axial fat-supressed T2WI MR showing an inhomogeneous lesion with a mainly high signal intensity with an associated intra-articular fluid.Note the inflammatory edema type changes in the adjacent soft tissues.
 
A coronal STIR image showing heterogeneous,mainly hyperintense lesion with intra-articular fluid.
 
A coronal STIR image showing adjacent bone marrow edema.
 
Axial T1WI MR image after the administration of a gadolinium contrast medium showing marked enhancement of both the lesion itself and surrounding soft tissues.
 
Coronal fat-supressed contrast-enhanced T1WI MR showing intra-articular fluid and marked enhancement of both the tumor and surrounding soft tissues.
 
Microscopic examination showing moderately thick,irregularly shaped trabeculae of woven bone with prominent osteoblastic rimming in a background of loose fibrovascular stroma.
 
 
 
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