EURORAD ESR

Case 13726

Intraosseous lipoma of the sacrum

Author(s)
Jokin Zabalza Unzué, Marta Tirapu Tapiz, Ainhoa Ovelar Ferrero, Natalia Álvarez de Eulate León, Cristina Jiménez Veintemilla

Ecay (Lónguida);
Email:jokinzabalza@hotmail.com
 
Patient
male, 52 year(s)
 
 
  • Figure 1
    Abdomen X-ray

    Poor delineation of the upper left neural foramina margins. No other relevant findings with this technique.

     
    Area of Interest: Abdomen; Imaging Technique: Digital radiography; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 2
    CT reformatted image of the sacrum.

    CT image depicts predominant low attenuation of fat (<−60 to −100 HU).

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 3
    CT reformatted coronal image of the sacrum

    CT image shows dystrophic calcification and prominent osseous trabeculae within the lesion, which is surrounded by a thin rim of sclerotic bone. The lesion abuts the articular surface of the sacroiliac joint without...

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 4
    T1-weighted and fat-saturated T1-weighted MR axial images

    T1-weighted image shows high signal intensity within the mass isointense to the subcutaneous fat. Fat-saturated T1-weighted image shows homogeneous suppression of the signal intensity consistent with fat content.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 5
    Fat-saturated T2-weighted MR axial image

    Fat-saturated T2-weighted image shows homogeneous suppression of the signal of the fatty component, hypointense dystrophic calcifications (blue arrow ) and a small hyperintense cystic area consistent with fat necrosis...

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
Poor delineation of the upper left neural foramina margins. No other relevant findings with this technique.
 
CT image depicts predominant low attenuation of fat (<−60 to −100 HU).
 
CT image shows dystrophic calcification and prominent osseous trabeculae within the lesion, which is surrounded by a thin rim of sclerotic bone. The lesion abuts the articular surface of the sacroiliac joint without joint involvement.
 
T1-weighted image shows high signal intensity within the mass isointense to the subcutaneous fat. Fat-saturated T1-weighted image shows homogeneous suppression of the signal intensity consistent with fat content.
 
Fat-saturated T2-weighted image shows homogeneous suppression of the signal of the fatty component, hypointense dystrophic calcifications (blue arrow ) and a small hyperintense cystic area consistent with fat necrosis (yellow arrow)
 
 
 
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