"Bone infarct accounts for one of the 'I's in the popular mnemonic for lucent bone lesions FEGNOMASHIC."
"T1 C+ FS (Gd): peripheral rim may enhance post gadolinium"
"Medullary infarct is a term roughly equivalent to bone infarct 13 but is less frequently used. The term may also be applied to some cases involving the epiphysis, but should not be used to describe subchondral osteonecrosis, in which case osteonecrosis (previously termed "avascular necrosis") is preferred."
Expected headings
"Signal characteristics"
"Bone scan"
"Complications"
"Bone infarction is a term used to refer to osteonecrosis within the metaphysis or diaphysis of a bone. Necrosis is a type of cell death due to irreversible cell injury, which can be recognised microscopically by alterations in the cytoplasm (becomes eosinophilic) and in the nucleus (swelling, pyknosis, karyorrhexis, karyolysis). Bone infarction results from ischaemia and can lead to destruction of the bony architecture, pain, and loss of function 1. Bone infarctions have numerous causes and have fairly distinctive imaging features on conventional radiography, CT and MRI."
"There is a significant delay between the infarct onset and development of radiographic signs, which can be variable 13."
"double-line sign: hyperintense inner ring of granulation tissue and a hypointense outer ring of sclerosis; absence of a double-line sign does not exclude bone infarct 13-16"