Radiology of Osteomyelitis Flashcards
what is osteomyelitis?
inflammation of bone due to infection (medullary)
what is cellulitis?
inflammation of connective tissue
what are some radiographic findings to suggest soft tissue swelling?
increased soft tissue thickness
increased soft tissue opacity, also look for gas
loss of normal soft tissue planes
what is a fistulogram?
injection of contrast material into a draining tract to asses extension of a wound, communication with body cavities, or to find foreign bodies
in whom does hematogenous osteomyelitis occur?
usually immature patients
where is lysis usually localized with hematogenous osteomyelitis?
where increased blood supply
can hematogenous osteomyelitis affect the joint space?
yes: septic arthritis
what is an involucrum?
necrotic halo around a sequestrum
what does discospondylitis lead to?
disc space collapse and block vertebrae
what are some common agents of discospondylitis?
E. coli
Brucella canis
S. aureus
Streptococcus
if you see lucent halos surrounding implants or bone cement, what are some rule-outs?
loosening
high speed drilling
osteomyelitis
what type of reaction is osteomyelitis?
aggressive
what are the types of hematogenous osteomyelitis?
physitis
epiphysitis
septic arthritis
does hematogenous osteomyelitis have periosteal reactions?
no- too fast
what is the nature of hematogenous osteomyelitis?
osteolytic
how can discospondylitis occur?
hematogenous spread: post-op or secondary to osteomyelitis
what is spondylitis?
inflammation
what is spondylitis infectiosa?
vertebral osteomyelitis
what can spondylitis infectiosa be from?
migrating foreign body, abdominal infection
penetrating wounds
when do artifactual halos disappear?
in raw images
