EURORAD ESR

Case 14910

An Old Lesion Strikes Again – Hamstring Apophyseal Avulsion

Author(s)
Almeida Costa, Nuno1; Costas Alvarez, Maria2;

1 - IPO - Porto (Instituto Português de Oncologia do Porto de Francisco Gentil), Portugal. Email:nunoada@hotmail.com
2 - POVISA Hospital – Vigo, Espana.
Email: mcostas@povisa.es
 
Patient
male, 55 year(s)
 
 
  • Figure 1
    Excentric ossification adjacent to ischial tuberosity

    Figure 1 – Axial CT image showing an ossification adjacent to the right ischial tuberosity demonstrating medular and bony cortex, with sclerosis and geodic formations.

     
    Area of Interest: Musculoskeletal system; Imaging Technique: CT; Procedure: Education; Special Focus: Trauma;
     
     
  • Figure 2
    Ossification of the insertion of the hamstrings tendons

    Figure 2 - Coronal T2W MR image showing an heterotopic ossification in the right ischiatic tuberosity. It presents fairly well delineated bone cortex with irregular margins. Note the attachment of the hamstrings...

     
    Area of Interest: Musculoskeletal system; Imaging Technique: MR; Procedure: Education; Special Focus: Trauma;
     
     
  • Figure 3
    Degenerative changes - apophyseal avulsion lesion

    Figure 3 - Coronal STIR MR image showing right ischial apophyseal avulsion lesion with marginal degenerative sclerosis and subchondral cysts (arrow).

     
    Area of Interest: Musculoskeletal system; Imaging Technique: MR; Procedure: Education; Special Focus: Trauma;
     
     
  • Figure 4
    Narrowing of the right ischiofemoral space

    Figure 4 – Axial STIR MR image depicting great narrowing of the right ischiofemoral space. There is a slight edema of the right quadratus femoris muscle (arrow).

     
    Area of Interest: Musculoskeletal system; Imaging Technique: MR; Procedure: Education; Special Focus: Trauma;
     
     
  • Figure 5
    Atrophy and fatty infiltration of the quadratus femoris muscle

    Figure 5 – Axial T2 image highlighting slight fatty infiltration of the right quadratus femoris indicating chronicity.

     
    Area of Interest: Musculoskeletal system; Imaging Technique: MR; Procedure: Education; Special Focus: Trauma;
     
     
Figure 1 – Axial CT image showing an ossification adjacent to the right ischial tuberosity demonstrating medular and bony cortex, with sclerosis and geodic formations.
 
Figure 2 - Coronal T2W MR image showing an heterotopic ossification in the right ischiatic tuberosity. It presents fairly well delineated bone cortex with irregular margins. Note the attachment of the hamstrings tendons (arrows).
 
Figure 3 - Coronal STIR MR image showing right ischial apophyseal avulsion lesion with marginal degenerative sclerosis and subchondral cysts (arrow).
 
Figure 4 – Axial STIR MR image depicting great narrowing of the right ischiofemoral space. There is a slight edema of the right quadratus femoris muscle (arrow).
 
Figure 5 – Axial T2 image highlighting slight fatty infiltration of the right quadratus femoris indicating chronicity.
 
 
 
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