Podcast
Questions and Answers
Medullary osteonecrosis is always caused by a fracture.
Medullary osteonecrosis is always caused by a fracture.
False (B)
On MRI, the serpiginous border of medullary osteonecrosis displays a low signal on T2-weighted images.
On MRI, the serpiginous border of medullary osteonecrosis displays a low signal on T2-weighted images.
False (B)
The presence of a lucent area with a sclerotic serpiginous border is seen in medullary osteoporosis.
The presence of a lucent area with a sclerotic serpiginous border is seen in medullary osteoporosis.
True (A)
The characteristics of normal fatty marrow are retained centrally within the infarction area of medullary osteonecrosis.
The characteristics of normal fatty marrow are retained centrally within the infarction area of medullary osteonecrosis.
The double-line sign on T2-weighted MRI images is associated with medullary osteonecrosis.
The double-line sign on T2-weighted MRI images is associated with medullary osteonecrosis.
Flashcards
Medullary Osteonecrosis
Medullary Osteonecrosis
Bone tissue death caused by insufficient blood supply.
What is Osteonecrosis?
What is Osteonecrosis?
A bone disease where the bone tissue dies due to a lack of blood supply.
What are the plain film findings of medullary osteonecrosis?
What are the plain film findings of medullary osteonecrosis?
A lucent area with a sclerotic serpiginous border on plain film.
What is the 'double-line' sign seen on T2 MRI for medullary osteonecrosis?
What is the 'double-line' sign seen on T2 MRI for medullary osteonecrosis?
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What is the signal on T1 MRI within the infarction of medullary osteonecrosis?
What is the signal on T1 MRI within the infarction of medullary osteonecrosis?
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Study Notes
Medullary Osteonecrosis
- Secondary to vascular compromise.
- Leads to severe architectural loss, functional loss, and pain.
- Important diagnosis.
- Plain film shows lucent area with sclerotic, serpiginous border of granulation tissue.
- MRI reveals:
- Low T1 signal from serpiginous border.
- "Double-line" sign on T2 (high signal granulation tissue surrounded by low signal sclerosis).
- Normal fatty marrow signal within the central infarction.
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