Leiomyosarkom der Vena saphena magna

Leiomyosarcoma
of the greater saphenous vein. Ultrasound of LMS of the greater saphenous vein. The tumour is heterogeneous and irregularly vascularised (Doppler signal to the upper right corner). The Doppler signal in the upper left corner is the vein.
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Leiomyosarcoma
of the greater saphenous vein. MR (T1 pre-contrast): The subcutaneous tumour is hypointense with almost the same intensity as muscle tissue. Note that the tumour is not invasive to the surrounding fat and muscle tissue.
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Leiomyosarcoma
of the greater saphenous vein. MRI (T1 fs after gadolinium administration): The tumour is now seen with heterogeneous enhancement.
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Leiomyosarcoma
of the greater saphenous vein. MR (TIRM): On this sequence the tumour is heterogeneous and hyperintense.
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Leiomyosarcoma
of the greater saphenous vein. PET-CT: The tumour is PET positive and localised, as shown in the image.
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Leiomyosarcoma
of the greater saphenous vein. MR (T1 after gadolinium administration): The image shows the heterogeneous hyperintense tumour in subcutis. Caudally the tumour seems to grow intraluminally in the vein.
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Leiomyosarcoma
of the greater saphenous vein. MR (T1 after gadolinium administration)
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Primary
leiomyosarcoma of the great saphenous vein: A case report:Color Doppler ultrasound - showing an endoluminal vascular mass within the greater saphenous vein (GSV).
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Primary
leiomyosarcoma of the great saphenous vein: A case report:Contrast enhanced magnetic resonance images – showing a soft tissue mass that arises from the greater saphenous vein along the distal medial aspect of the right thigh. Sagittal T1 fat sat with contrast (A), Axial T1 fat sat with contrast (B), Axial T2 (C), and Axial T2 fat sat (D).
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Leiomyosarkom der Vena saphena magna

Leiomyosarkom von Venen

Leiomyosarkom Radiopaedia • CC-by-nc-sa 3.0 • de

Leiomyosarcomas are extremely rare malignant neoplasms that originate from smooth muscle cells and may be considered the malignant counterpart of a leiomyoma. They are classified as a soft tissue tumor and account for ~8% of malignant soft tissue tumors .

Pathology

Location 

Leiomyosarcomas can potentially occur anywhere where there is smooth muscle. Commonly described sites include the following:

Other sites include

Radiographic features

Morphological imaging features would be invariably dependent on the site (refer to individual articles). Generally, they tend to be large masses, especially with abdominopelvic lesions.

CT
  • generally heterogeneous
  • commonly demonstrate central low attenuation representing necrosis
  • calcification exceedingly rare
MRI

The tumor frequently demonstrates cystic foci. Signal characteristics include

  • T1: isointense to muscle
  • T2 non-fat suppressed: intermediate to hypointense to neighboring fat
  • T2 FS: predominantly hyperintense

Differential diagnosis

For a meaningful differential, it is necessary to consider site-specific tumors.

Siehe auch:
Assoziationen und Differentialdiagnosen zu Leiomyosarkom der Vena saphena magna:
Leiomyosarkom
von Venen
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Leiomyom der
Vena saphena magna
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