Slide Exam Prep Flashcards
DISH main radiographic features
- At least 4 contiguous vert. bodies with hyperostosis
- Marginal syndesmophytes
- Lucency btw ossification and vert body
Normal:
- disc height
- subchondral bone
- facets
NO SMT
Ankylosing Spondylitis main radiographic features
- Romanus lesions (corner erosion)
- Shiny corner sign
Symmetrical BL sacroilitis
- bead sign
- sclerosis (+/- star sign)
- ghost sign (complete fusion)
Marginal syndesmophytes
- fine, multilevel
- BL symmetrical
- Bamboo spine
- osteoporosis
- carrot stick fracture
- dagger sign
- trolley track sign
NO SMT
Psoriatic Arthritis
Syndesmophytes:
- non-marginal
- asymmetrical
Increased ADI
U/L or B/L Asymmetrical sacroilitis
-bead sign, sclerosis
** Same radiographic findings as Reactive Arthritis in the spine **
NO SMT
Reactive Arthritis
** Same radiographic findings as Psoriatic Arthritis in spine **
+finger signs for next slide exam
NO SMT (double check?)
Osteitis Condensans Ilii
- isolated to SIJ
- B/L triangle sclerosis in ilium subchondral bone
- just ilium side
- no erosions or joint space change
- just sclerosis
CAN SMT but not useful
Osteitis Pubis
- erosions, motheaten, wider pubic symphysis
- local osteoporosis
** Can’t tell appart from Infection off radiograph only **
No SMT?
CPPD
Small linear horizontal calcification in disc at multiple levels
*meniscus calcification
Can SMT
HADD
Small calcification anterior to C2
Calcification of longus colli muscle
Can SMT?
Hypertrophic Osteoarthropathy
- long bone periostitis
- digital clubbing
- B/L symmetrical
SMT?
Differentials for B/L symmetrical sacroiliitis
AS
Enteropathic Arthritis
Osteitis Condensans Ilii
Differential for U/L sacroiliitis
Rheumatoid A.
Infection
DJD
Also Reactive / PA
Differential for B/L asymmetrical sacroiliitis
PA / Reactive
Differential for non-marginal syndesmophytes
- DJD
- DISH
- PA / Reactive
Differential for Marginal syndesmophytes
-Ankylosing spondylitis
More?
Paget’s
Cortical thickening Expansion Coarsened trabeculae Sclerosis / Ivory Pahological fractures
Spine:
-picture frame vertebra
Pelvis:
- lost kohlers teardrop
- thick pubis
- brim sign
- acetabulae protrusio
Skull:
…
Long bones:
- bade of grass defect-pseudofractures
- more..
NO SMT
Differential for Ivory vertebra
Pagets (+ expansion)
Bastic mets
Hodgkins (+ anterior erosio / scallop)
Fibrous Dyslasia
-rare in the spine
+ more on other areas
+add later
NO SMT
Neurofibromatosis
Nerve sheath overgrowth (neoplasm)
- cortex intact
- no other changes
- posterior scalloping
- short angular scoliosis
- kyphosis
- IVF very large (means its in the IVF)
-scalloped ribs
No SMT
Differential for posterior scalloping
Neurofibromatosis Marfans Ehlers Danlos Achondroplasia Osteogenesis imperfecta
Differential for sclerotic benign lesions
Osteoma
-gardner’s syndrome
Osteoid osteoma
Osteochondroma
-Hereditary multiple exostoses
Differential for lucent benign lesions
Haemangiona
Non-ossifying fibroma
Fibrocortical defect
Simple bone cyst
Aneurysmal bone cyst
Giant cell tumour
Osteobastoma
Enchondroma
- Ollier’s disease
- Marfucci’s syndrome
Chondroblastoma
Differential for sclerotic malignant lesion
Osteosarcoma
-Parosteal osteosarcoma
Metastasis
Differential for mixed sclerotic and lucent malignant lesion
Osteosarcoma
Mets
Differential for lucent malignant lesion
Plasmacytoma
Chordoma
Ewing’s sarcoma
Malignant GCT
Chondrosarcoma
Fibrosarcoma
Non-Hodgkins Lymphoma
Hodgkins Lymphoma
Multiple Myeloma
Mets
Gardner’s Syndrome
- multiple osteomas (skull + hands and feet)
- multiple solid osseous growth off cortex
(Not really spine)
Can SMT?
Hereditary Multiple Exostoses
Multiple osteochondromas
-not realy spine
Can SMT?
Osteoblastoma
- sclerotic periosteal rim around lucent nidus >25mm diameter
- expansive, thins cortex
- posterior elements of spine
- C1 SP
-scoliosis
DDx:
- Osteoid osteoma (smaller)
- ABC (more expansion + no sclerotic rim)
Can SMT?????
Ollier’s Disease
Multiple enchondromas
Marfucci’s Syndrome
Very rare
Chondroblastoma
- epiphyseal
- not realy spine
Parosteal Osteosarcoma
- lobulated sessile mass
- lytic portions
- juxtacortical (bone surface)
DDx: osteoma (smoother)
Not really spine,
-posterior femur distal metaphysis
Plasmacytoma
- geographic lucent soap bubbly
- expansive
- fades away bone areas
DDx:
- chordoma
- malignant GCT
- mandible, ilium, vertebra, ribs
- prox femur, scapula, sacrum
Chordoma
- invades surrounding STs
- large
- crosses disc space
DDx: infection
- rare
- 85% sacrococcygeal or spheno-occipital
Hodgkins Lymphoma
-vertebral body
- anterior scalloping of vert body
- ivory vertebra
DDx:
- Multiple myeloma
- Pagets
Jefferson’s fracture
APOM: lateral masses shift past articular processes C2
-say transverse ligament rupture if masses displaced >7mm
Hangman’s fracture
- B/L pedicle fracture
- Lateral view
-hyperextension injury
Differential for increased ADI
- agenesis dens
- agenesis posterior arch
- RA
- PA
- trauma
- Downs
- Marfans
- Ehllers Danlos
- Morquio’s
C1 posterior arch fracture
-look at images
Pillar fracture
- wider, altered shape
- look at images
Posterior ponticle
Bridging C1 poaterior arch and occiput
Can SMT
Uncinate fracture
- tiny triangle on AP view
- rare
Differential for blurry C1 SP
Malignant:
- chordoma
- plasmacytoma
- lytic mets
Benign
- osteoblastoma
- ABC
- GCT
Differential for missing pedicle on AP view
Lytic mets
Osteobastoma
Chordoma
*multiple myeloma spares the pedicle
Differential for vertebral body destruction
Disc space intact
Lytic mets
Chordoma
Plasmacytoma
Differential for posterior elements destruction
Infection
Lytic mets
Differential for triangular ossific density anterior to the disc space
- Limbic bone (smaller than defect)
- Intercalary bone (in front and no defect)
- Teardrop fracture (exact missing piece)
- Ring epiphysis (widespread)
- Compression fracture (ish)
Differential for bony fragment posterior to C7
- clay shovelers fracture perfect match and displaced a bit)
- persistent apophysis (smaller)
- nuchal bone (vertical)
Agensis dens
- can’t see odontoid
- triangular anterior arch + bigger + more sclerotic
TVP fracture
C7 TVP
Lumbar TVP
Sacral fractures
- usually also pelvic fractures
- not on SLIDE exam 1?
Differential for single non-marginal syndesmophyte
Psoriatic arthritis
DJD?
DISH?
**
Picture frame vertebra
Pagets
Sandwich vertebrae
Bone-in bone look
Osteopetrosis
Rugger Jersey spine
Hyperparathyroidism
What are the elements in the description of a scoliosis?
- Convex side
- Start and end
- Cobb angle
- Apex
- Rotation: grade, side, span
- Skeletal maturity: Risser’s or epyphysis visible
- Obvious cause
- Secondary consequences (DJD)
Grade rotation of a scoliosis
1+ pedicle bit to midline (other overlaps with edge of vert)
2+ pedicle 2/3 midline (other barely visible)
3+ pedible midline (other not visible)
4+ pedicle past midline (other not visible)
Risser Sign grading
- 25% grown
- 50%
- 75%
- 100% visible
- Fused to ilium (closed)
Where is most degenerative spondylolysthesis? And Isthmic ? Dysplastic?
DJD spondy : L4
Pars fracture: L5
Congenital: L5
C1 posterior arch agenesis
- C2 megaspinous
- C1 anterior arch hypertrophy
DDx: occipitalisation
NO SMT until proven stable
Agenesis pedicle
- winking owl
- sclerotic C/L pedicle
DDx:
- Lytic mets
- rotation
Yes SMT. Stable
Agenesis articular process
Check images
Yes SMT. Stable
Hemivertebra
Check images
-short angular scoliosis
NO SMT
Caudal Regression Syndrome
- sacral agenesis
- 2 lia articulate
Os odontoideum
- lucent gap
- failure of fusion of dens to body
- instable
DDx:
- mach effect
- fracture
NO SMT. Unstable