EURORAD ESR

Case 13960

Extraskeletal Ewing sarcoma

Author(s)
Ainhoa Ovelar Ferrero, Natalia Álvarez de Eulate León, Pilar Fernández Seara, Juan José Sánchez-Villares Rubalcaba, Julia Alonso Yerro

Complejo Hospitalario de Navarra,
Radiology; Irunlarrea, 4
31008 Pamplona, Spain;
Email:ainhiof@gmail.com
 
Patient
female, 40 year(s)
 
 
  • Figure 1
    Lateral and AP radiographs of the ankle

    Radiographs show an osteochondroma (white arrow) and a soft-tissue mass, not seen in the AP projection, obliterating the Kager fat pad (pink arrows).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: Plain radiographic studies; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 2
    Ultrasound (US)

    US reveals an hypoechoic oval soft-tissue mass with internal vascularization at Colour Doppler US. Posterior tibial nerve can be seen apparently entering the lesion (arrows).

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 3
    MRI
     

    STIR image demonstrates a hyperintense lesion.

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

    T1W image reveals an oval mass obliterating the Kager fat pad. The mass demonstrates intermediate to high signal intensity. The posterior tibial nerve can be seen apparently entering the lesion (arrow).

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

    T2W image reveals a heterogeneous signal intensity mass with areas of both intermediate and high signal intensity.

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

    T1FSW image after contrast administration: the mass demonstrates diffuse enhancement, slightly heterogeneous.

     
    Area of Interest: Musculoskeletal soft tissue; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
Radiographs show an osteochondroma (white arrow) and a soft-tissue mass, not seen in the AP projection, obliterating the Kager fat pad (pink arrows).
 
US reveals an hypoechoic oval soft-tissue mass with internal vascularization at Colour Doppler US. Posterior tibial nerve can be seen apparently entering the lesion (arrows).
 
STIR image demonstrates a hyperintense lesion.
 
T1W image reveals an oval mass obliterating the Kager fat pad. The mass demonstrates intermediate to high signal intensity. The posterior tibial nerve can be seen apparently entering the lesion (arrow).
 
T2W image reveals a heterogeneous signal intensity mass with areas of both intermediate and high signal intensity.
 
T1FSW image after contrast administration: the mass demonstrates diffuse enhancement, slightly heterogeneous.
 
 
 
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