CTC Msk

Question 1

Components tfcc

Answer 1

Ttiangular fc/articular disc t1/t2 dark
Dorsal and volar radiocarpal ligaments
Tiangular ligament-fovea and styloid
Lcl
Ulnomeniscal homologue
Ecu tendon

Question 2

Wrist tenosynovitis

Answer 2

Infection

Ra or tb-ra starts ecu

Dequervain - washer woman
Intersection - 1 and 2 - rowers
Drummer - 3 epl

Question 3

Shoulder dislocations signs

Answer 3

Trough sign
Rim sign
Light bulb

Luxatio erecta - inferior

Question 4

Adhesive capsulitis

Answer 4

Fat to fibrosis in rotator interval between supra and subscap around biceps
Low t1/2
Thickened chlig or axiosry recess capsule 4mm

Question 5

Shoulder labrum lesions

Answer 5

Slap - superior labral a to p - overhead eg swimming
Fraying - tear - full thickness - biceps anchor
Mimics - sublabral recess, foramen, buford -absent 0-3 with thickened mghl

Bankart - bony, soft, partial/incomplete
Partial bankarts:
Perthes - periodteal stripping
Glenolabral articular disruption
Anterior labral periosteal sleeve avulsion - labrum avulsed into periosteal sleeve

Question 6

Hagl

Answer 6

Humersl avulsion GHL

Question 7

Atrophy shoulder entrapments

Answer 7

Suprascapular - ss is
Spinoglenoid - is
Quadrangular space - tm TM humerus LHT gets tm and deltoid

Question 8

Bisphosphonate

Answer 8

Lateral

Question 9

Segond

Answer 9

Lateral

Question 10

Magic angle

Answer 10

55deg t1/pd/gre. Goes away on t2

Question 11

Dexa

Answer 11

T -1 - -2.5 paenia do frax to calculate 10yr risk hip fracture >3% rx
.-2.5 oporosis

Question 12

Navicular

Answer 12

Kohlers

Question 13

2nd mt head

Answer 13

Freiburg infraction

Question 14

Calcaneal apophysis

Answer 14

Severs

Question 15

Capitellum

Answer 15

Panners. Slightly older age get ocl

Question 16

Femoral head

Answer 16

Perthes

Question 17

Lunate

Answer 17

Keinbock

Question 18

T spine

Answer 18

Scheuermann

Question 19

Tibial tubercle inferior patella

Answer 19

Osgood schlater, sinding larsen johansson

Question 20

Ocl grading

Answer 20

1 - oedema
2-non detached fracture
3-detached non displaced
4-displaced
5-oa

Question 21

Sequestrum

Answer 21

Lymphoma
Infection
Fibrosarcoma
Eg

Osteoid osteoma is mimic

Question 22

Fluid fluid levels

Answer 22

Telamgectatic OS
ABC
GCT

Question 23

Chordoma

Answer 23

Sacrum>clivus>c2

Question 24

Under 30 differential

Answer 24

Abc nof chondroblastoma lch solitary bone cyst

Infection - any age

Question 25

Epiphysis

Answer 25

Abc infection gct chondroblastoma clear cell chondrosarcoma

Question 26

Fd

Answer 26

``` Long lesion long bone gg matrix No periosteal rxn No pain Shepherd crook -also pagets/oi If pelvis also femur Monostotic 20s/30s poly <10 20%poly often unilat ``` Mccune albright - pofd, precocious puberty, cafe au lait Mazabraud - pofd, soft tissue myxomas T1 low T2 high on background t2 low Active enhance Long bones skull ribs Abnormal osteoblasts lay down immature bone 0.5% osteo>fibro>chondrosarc

Question 27

Nof

Answer 27

Spindle cells <20 around knee and disteal tib <2cm fcd >3nof Cortical sclerotic border

Question 28

Enchondroma

Answer 28

Any age Chondroid matrix T1 dark t2 bright Ollier - muotiple enchondromas, slight increased risk malignant Mafucci - multiple enchondromas and haemangiomas and probably higher risk cancer ?chondrosarc - >4-5cm, >2/3thick periodteal scalloping, pain, chamging matrix

Question 29

Lch

Answer 29

85% <30 Histiocytes some monocolonal some polyclonal ?reactive Flat bones>long bones>spine. Favours VB - plana M2f1 caucasians Vertebra plana, bevelled edge skull with sequestrum, floating tooth classic Letterer siwe - acute disseminated hepatosplenomagsly, LN, rash 10% Hans schueller christian chronic disseminated hsm, ln, diabetes insipidis, pilmonary fibrosis 20% 70% osseous or pulmonary

Question 30

Vertebra plana

Answer 30

Imelt | Infection mets myeloma eg lymphoma trauma tb

Question 31

Sequestrum

Answer 31

Lymphoma infection fibrosarcoma eg

Question 32

Gct

Answer 32

20-30 Closed physis, non sclerotic margin, abuts articular surface 5% malignant, met to lung. 25% recur, prognosis in recurrence worse

Question 33

Osteoid osteoma

Answer 33

M2f1 10-25 metadiaphysis long bones classic femoral neck 10% posterior elements spine. >2cm osteoblastoma Double density bonescsn T1 dark t2 bright enhances Lucent nidus surrounded by sclerotic reaction

Question 34

Lucent lesion posterior elements

Answer 34

Bam | OsteoBlastoma, abc, met

Question 35

Classic solitary bine cyst

Answer 35

Humerus calcaneus , 90% tubular bones mostly humerus femur | Age under 30

Question 36

Brown tumour

Answer 36

Giant cells and fibrous tissue

Question 37

Chondroblastoma

Answer 37

``` Epiphysis skeletally immature 50% chondroid matric Sclerotic rim Eccentric Can have periosteal reaction T1 low t2high or low 10-25 m>f can have sec ABC ```

Question 38

Cmf

Answer 38

Age under 30 large range Bubbly sclerotic rim eccentric metaphysis +/- epiphysis Differential for abc, gct

Question 39

Gt Lt Intertroch classics

Answer 39

Gt - aigc esp c Lt - met Intertrochh - lipoma, fd, ubc

Question 40

Calcaneus

Answer 40

Abc - no its UBc/lipoma - fat, fallen fragment or fat necrosis calc anterior body Infection usually posterior Gct/c/osteoid osteoma superior

Question 41

Blastic met

Answer 41

Prostate breast carcinoid medullo

Question 42

Lytic met

Answer 42

Rcc thyroid

Question 43

Poems

Answer 43

``` Polyneuropathy organomegaly (hs) endocrinopathy m protein Sclerotic or mixed bone lesions ```

Question 44

Pagets

Answer 44

``` Blade of grass Cotton wool Osteoporosis circumscripta Tam o shanter Picture frame and ivory vertebraesaber shin Banana fracture ```

Question 45

Tibial bowing

Answer 45

Physiologic between 18months and 2 years apex lateral / varus Blounts varus Rickets or hypophosphatasia apex lateral Abnormal intrauterine positioning, foot deformitis - apex posterior Nf1 apex anterolateral, my have hypoplastic fibula or pseudoarhtrosis