Low-grade chondrosarcoma: sternum

Case contributed by Domenico Nicoletti
Diagnosis certain

Presentation

Chest mass.

Patient Data

Age: 90 years
Gender: Female
Frontal
Lateral
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Info

Anterior mediastinum opacity without the silhouette sign.

This study is a stack
Axial C+ portal
venous phase
This study is a stack
Axial lung
window
This study is a stack
Axial bone
window
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Voluminous solid neoformation infiltrating the distal part of the sternal manubrium and the adjacent left ribs.

This lesion, extended to the upper lobe of the left lung, shows enhancement of the septa and in the periphery with some calcifications in the context.

The lung is normal. 

This study is a stack
Axial
STIR
This study is a stack
Axial
T1
This study is a stack
Axial
T2
This study is a stack
Coronal PD
fat sat
This study is a stack
Sagittal
T1
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The lesion has inhomogeneous signal intensity on T1 and T2 sequences and has inhomogeneous enhancement after administration of contrast medium.

pathology
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Guided TC biopsy (histological report​)

Case Discussion

Chondrosarcomas are a primitive malignant tumor that derives from cartilage cells. It usually appears at the center of a bone segment, with no pre-existing lesions (central chondrosarcoma). It may also be secondary to a pre-existent condition such as an exostosis (peripheral chondrosarcoma).

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