EURORAD ESR

Case 13064

A rare case of Rosai Dorfman disease presented as bone tumour

Author(s)
Ng, Fung Him; Luk, Wing Hang; Lo, Xu Ning Adrian; Wai, Ka Heng Ophelia; Chan, Chi Sang James

Department of Radiology and Organ Imaging,
United Christian Hospital,
130 Hip Wo Street, Kwun Tong,
Kowloon, Hong Kong
Email:nfh667@ha.org.hk
 
Patient
female, 49 year(s)
 
 
  • Figure 1
    X-ray left knee
     

    A small faint lucency at the metaphyseal region of the distal femur, best appreciated on lateral view. No periosteal reaction or cortical involvement.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: Plain radiographic studies; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    A small faint lucency at the metaphyseal region of the distal femur, best appreciated on lateral view. No periosteal reaction or cortical involvement.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: Plain radiographic studies; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 2
    CT left knee
     

    An irregular lobulated lytic lesion with incomplete sclerotic border at lateral femoral condyle with surrounding small lytic areas. The lesion extends inferiorly with a breakage of cortex. Mild surrounding bony...

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

    An irregular lobulated lytic lesion with incomplete sclerotic border at lateral femoral condyle with surrounding small lytic areas. The lesion extends inferiorly with a breakage of cortex. Mild surrounding bony...

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 3
    MRI left knee (axial)
     

    T1W: The lesion showed intermediate signal on T1, with adjacent bone marrow edema.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    PD: The lesion showed high signal on PD sequence.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T2W: The lesion showed high signal on T2.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T1W+C: The lesion showed contrast enhancement

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T1W+C with water excitation: The lesion showed contrast enhancement

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 4
    MRI left knee (sagittal)
     

    T1W: The lesion showed intermediate signal.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T2W: The lesion showed high signal with surrounding bone marrow oedema.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T1W+C: The lesion showed contrast enhancement.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 5
    MRI left knee (coronal)
     

    T1+C+WE: The lesion showed contrast enhancement.

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    T2W: The lesion showed high T2 signal, surrounded by bone oedema

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 6
    MRI left knee series (T1W+C)

    The lesion showed contrast enhancement

     
    Area of Interest: Musculoskeletal bone; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
A small faint lucency at the metaphyseal region of the distal femur, best appreciated on lateral view. No periosteal reaction or cortical involvement.
 
A small faint lucency at the metaphyseal region of the distal femur, best appreciated on lateral view. No periosteal reaction or cortical involvement.
 
An irregular lobulated lytic lesion with incomplete sclerotic border at lateral femoral condyle with surrounding small lytic areas. The lesion extends inferiorly with a breakage of cortex. Mild surrounding bony sclerosis. No periosteal reaction.
 
An irregular lobulated lytic lesion with incomplete sclerotic border at lateral femoral condyle with surrounding small lytic areas. The lesion extends inferiorly with a breakage of cortex. Mild surrounding bony sclerosis. No periosteal reaction.
 
T1W: The lesion showed intermediate signal on T1, with adjacent bone marrow edema.
 
PD: The lesion showed high signal on PD sequence.
 
T2W: The lesion showed high signal on T2.
 
T1W+C: The lesion showed contrast enhancement
 
T1W+C with water excitation: The lesion showed contrast enhancement
 
T1W: The lesion showed intermediate signal.
 
T2W: The lesion showed high signal with surrounding bone marrow oedema.
 
T1W+C: The lesion showed contrast enhancement.
 
T1+C+WE: The lesion showed contrast enhancement.
 
T2W: The lesion showed high T2 signal, surrounded by bone oedema
 
The lesion showed contrast enhancement
 
 
 
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