Peripheral primitive neuroectodermal tumor (pPNET) of the femur

Case contributed by Saeed Soltany Hosn

Presentation

A known case of peripheral primitive neuroectodermal tumor referred to our hospital for total hip arthroplasty

Patient Data

Age: 20 years
Gender: Female
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An ill-defined lytic lesion with a moth-eaten appearance is seen in the metaphysis, neck and head of the right femur.

This study is a stack
Axial C+
delayed
This study is a stack
Axial bone
window
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Patchy destructive bony changes associated with soft tissue components demonstrated within the femoral head and neck as well as amorphous periosteal reaction. There is also evidence of bone marrow involvement. The tumor has grown along a needle biopsy track in the subcutaneous tissue

This study is a stack
Coronal
T1
This study is a stack
Coronal
T2
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Axial PD
fat sat
This study is a stack
Coronal
T1 C+
This study is a stack
Coronal T1
C+ fat sat
This study is a stack
Axial T2
fat sat
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MRI shows bone marrow involvement and soft tissue component of the tumor which surround the femur. The soft tissue mass signal is similar to that of muscle on T1WI and high on T2WI.

Following the administration of gadolinium, the mass shows intense enhancement.

Case Discussion

Peripheral primitive neuroectodermal tumor (pPNET) of the proximal right femur in a 20 year old female.

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