Lab Flashcards
– 4-8 yo – Asymptomatic – Posterior – medial surface of distal
femur, lower extremity – Could be associated with avulsion
fracture at a muscle attachment
fibrous cortical defect
– 8-20 yo – Due to faulty ossification, and not a true neoplasm – Usu asymptomatic – Large lesion may be painful, >8 cm
• Pathologic fracture
• Stress fracture – MC distal tibia – Diametaphyseal and eccentric
Non-Ossifying Fibroma
– Located anywhere, except in skull – Discrete area of sclerosis in bone – Asymptomatic and clinically insignificant – Areas of compact bone subject to same metabolic influences
affecting skeletal system in general – Compact bone within normal bone spongiosa
bone island
are bone island pain generators
no
how do you know it is a T1 sequence MR
fatty bone marrow is highlighted
most common benign bone tumor of the hand
solitary enchondroma
– Geographic radiolucent expansile
lesion – Endosteal scalloping – Centrally placed in metaphysis – 50% have punctate calcification due to
cartilagenous matrix
Solitary Enchondroma
if fat goes black on a MR, what type of sequence
STIR/SPUR
shows water well
– Usu <1.0 cm in size – Radiolucent nidus with surrounding reactive
sclerosis – Nidus may calcify
osteoid osteoma
scoliosis cobbs angle has to be > than ____ degrees
10
DO NOT RESTRICT ACTIVITES IN SPINAL HEMANGIOMA
TRUE
polka dot appearance
hemangioma
hemangioma is best seen on what MRI
T1 and T2
low signal
tx for hemangioma of the skull
neuro surgery
when CSF is low signal
T1
