EURORAD ESR

Case 11260

Synovial haemangioma of the knee

Author(s)
Natacha JOUVEN, Sana BOUDABBOUS

Hopitaux universitaires de Geneve (HUG);
4, rue Gabrielle-Perret-gentil,
1211 Genève 14, Switzerland;
Email:natacha.jouven@hcuge.ch
 
Patient
female, 42 year(s)
 
 
  • Figure 1
    Knee X-ray
     

    Frontal knee radiograph shows no bone lesion.

     
    Area of Interest: Musculoskeletal joint; Imaging Technique: Conventional radiography; Procedure: Diagnostic procedure; Special Focus: Acute;

    Lateral knee radiograph reveals a small joint effusion (small arrow) with a mass in the Hoffa's fat pad (long arrow).

     
    Area of Interest: Musculoskeletal joint; Imaging Technique: Conventional radiography; Procedure: Diagnostic procedure; Special Focus: Acute;
     
     
  • Figure 2
    MRI of the knee.
     

    Sagittal T1W MR image shows a hypointense intra-articular lobulated mass in the infra-patellar pouch, with no evidence of fat components (white arrow).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    Sagittal proton-density fat-satured MR image shows a homogeneously hyperintense intra-articular lobulated mass in the infra-patellar pouch (long arrow), and a synovial effusion (small arrow).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    Axial T2* GRE MR image shows an intra-articular mass in the infra-patellar pouch, containing hypointense linear structures, without haemosiderin deposit (white arrow).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    Sagittal T2W MR image shows marked enhancement of the lesion after injection of gadolinium contrast (long arrow), and a synovial effusion (short arrow).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;
     
     
  • Figure 3
    CT of the knee performed for the biopsy
     

    Sagittal non-contrast enhanced CT image, in soft tissue window, shows the intra-articular mass in the infra-patellar pouch (white arrow).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    Sagittal non contrast enhanced CT image, in bone window, confirms erosion of the inferior aspect of the patella (white arrow).

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Arteriovenous malformations;

    CT-guided percutaneous biopsy with a 16G needle (Bonopty R Apriomed).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: CT; Procedure: Biopsy; Special Focus: Arteriovenous malformations;
     
     
Frontal knee radiograph shows no bone lesion.
 
Lateral knee radiograph reveals a small joint effusion (small arrow) with a mass in the Hoffa's fat pad (long arrow).
 
Sagittal T1W MR image shows a hypointense intra-articular lobulated mass in the infra-patellar pouch, with no evidence of fat components (white arrow).
 
Sagittal proton-density fat-satured MR image shows a homogeneously hyperintense intra-articular lobulated mass in the infra-patellar pouch (long arrow), and a synovial effusion (small arrow).
 
Axial T2* GRE MR image shows an intra-articular mass in the infra-patellar pouch, containing hypointense linear structures, without haemosiderin deposit (white arrow).
 
Sagittal T2W MR image shows marked enhancement of the lesion after injection of gadolinium contrast (long arrow), and a synovial effusion (short arrow).
 
Sagittal non-contrast enhanced CT image, in soft tissue window, shows the intra-articular mass in the infra-patellar pouch (white arrow).
 
Sagittal non contrast enhanced CT image, in bone window, confirms erosion of the inferior aspect of the patella (white arrow).
 
CT-guided percutaneous biopsy with a 16G needle (Bonopty R Apriomed).
 
 
 
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