Osteosarcoma MRI: Difference between revisions
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*MRI is proving essential in accurate local staging and assessment for limb sparing resection, particularly for evaluation of intraosseous tumor extension and soft-tissue involvement. | *MRI is proving essential in accurate local staging and assessment for limb sparing resection, particularly for evaluation of intraosseous tumor extension and soft-tissue involvement. | ||
*Assessment of the growth plate is also essential as up to 75-88% of metaphyseal tumors do cross the growth plate into the epiphysis. | *Assessment of the growth plate is also essential as up to 75-88% of metaphyseal tumors do cross the growth plate into the epiphysis. | ||
*On MRI, signal characteristics of osteosarcoma include: | |||
'''T1''': | '''T1''': | ||
| Line 12: | Line 13: | ||
:*Peri-tumoral edema: intermediate signal intensity. | :*Peri-tumoral edema: intermediate signal intensity. | ||
:*Scattered regions of haemorrhage will have variable signal. | :*Scattered regions of haemorrhage will have variable signal. | ||
'''T2''': | '''T2''': | ||
:*Soft tissue non-mineralised component: high signal intensity. | :*Soft tissue non-mineralised component: high signal intensity. | ||
:*Mineralised/ossified components: low signal intensity. | :*Mineralised/ossified components: low signal intensity. | ||
:*peri-tumoral oedema: high signal intensity. | :*peri-tumoral oedema: high signal intensity. | ||
'''T1 C+ (Gd)''': | |||
:*Solid components show considerable enhancement. | |||
Revision as of 13:09, 24 September 2015
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Osteosarcoma Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Osteosarcoma MRI On the Web |
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American Roentgen Ray Society Images of Osteosarcoma MRI |
Overview
MRI
- MRI is proving essential in accurate local staging and assessment for limb sparing resection, particularly for evaluation of intraosseous tumor extension and soft-tissue involvement.
- Assessment of the growth plate is also essential as up to 75-88% of metaphyseal tumors do cross the growth plate into the epiphysis.
- On MRI, signal characteristics of osteosarcoma include:
T1:
- Soft tissue, non-mineralized component: intermediate signal intensity.
- Mineralized/ossified components: low signal intensity.
- Peri-tumoral edema: intermediate signal intensity.
- Scattered regions of haemorrhage will have variable signal.
T2:
- Soft tissue non-mineralised component: high signal intensity.
- Mineralised/ossified components: low signal intensity.
- peri-tumoral oedema: high signal intensity.
T1 C+ (Gd):
- Solid components show considerable enhancement.
-
MRI T1 -
MRI T1 -
MRI T1 post gad -
MRI T1 post gad -
MRI T2 fat sat -
MRI T2 fat sat
