Imaging SBAs Unit 2 Flashcards
Patella baja vs alta risks
Baja associated with quads tendon rupture
Alta associated with patellar tendon rupture
RA typically spares
SI joints
Mysitis ossificans can have
Periosteal reaction
High t2 signal in medial meniscus only breaching articular surface on one slice
Intrasubstance degeneration only
Old female, purely cortical lucencies
Aggressive osteoporosis
Tibialis posterior tendon rupture associated with
Spring ligament tearing and abnormal sinus tarsi
Poorly defined lucency with no periosteal reaction after minor trauma
Pseudolucency
Good response to bony mets on bone scan
Increased intensity of lesions with absence of new lesions
Osteoma vs osteoblastoma
Osteoblastoma pain is not usually relieved by aspirin
Young adult, painful scoliosis, expansile soap bubble lesion in posterior elements
Osteoblastoma
Scheuermann’s disease can cause
Vertebral plana
Hair on end periosteal reaction
Benign
Low T1, High T2 in upper outer quadrant of patella
Normal variant
Hurlers spine
Posterior scalloping
Causes of anterior spine scaloping
Downs,
TB,
Aortic aneurysm,
Chronic leukaemia
Staging of AVN
Ficat staging
1: normal or slightly increased or deminished density
2: mixed osteopenia and sclerosis
3: subchondral collapse or crescent sign
4: articular collapse
5: progression to degenerative joint disease
Fragmentation anterior to tibial tubercle, enlargement of patellar tendon with increased T1 and T2 distally
Osgood-Schlatter
Dense metaphyseal bands caused by
Normal variant,
Treated leukaemia,
Rickets
Heavy metal
Scurvy
Numerous small areas of sclerosis scattered throughout the skeleton
Osteopoikilosis
Bamboo spine, disc calcification, skin pigmentation
Alkaproteinuria
Commonest cause of neuropathic arthritis in upper limbs
Syringomyelia
Acromegaly spinal features
Increased vertebral height,
Posterior scalloping,
DISH,
Elongation and widening of vertebral bodies
MRI features of gout
Iso T1, Low T2
Common locations for bone resorption in hyperparathyroidism
SI joint,
Middle phalanx,
Distal phalanx,
Distal clavicles
Avulsion injury of deltoid ligament caused by
Eversion injury
Hangman’s fracture
Posterior arch fracture of C2 secondary to hyperextension injury
Secondary chondrosarcomas usually arise from
Enchondroma or osteochondroma
Paget’s bony appearance in child with superscan
Hyperphosphatasia
Medial leg pain in new runner, diffuse uptake in posteriomedial tibia on bone scan
Shin splints (medial tibial stress syndromE)
Pagets vs mets in bone scan
Vertebral mets are unlikely to involve posterior elements
Multiple expansile bony lesions with soft tissue masses
Mazabraud syndrome (polyostotic fibrous dysplasia associated with soft tissue mycomas)
Osteomyelitis appearance on MRI
Confluent low signal marrow change on T1
Common locations of osteomyelitis of foot
Distal to TMJs, Calcaneus, Malleoli
US appearances of tennis elbow
Intratendinous thickening with calcification and diffuse heterogeneity of the common extensor tendon
