Int Derangement Flashcards
% of OCD involving the bone
75%
Loc of dorsal patellar defect
Superolateral
Loc of OCD in talar dome
Mid 1/3rd of lateral border or Post 1/3rd of medial border
Effusion in the first few hours is usually d/t
hemarthrosis; Non-bloody ones take 12-24 hours
Stress reaction on tibia
Post medial cortex
SCFE prognosis by type
I to III - Good
IV - Gaurded
V - Poor d/t vascular supply damage
MVMT of the femoral epiphysis in SCFE
Postero-infero-medial
Des juvenile Tillaux Fx
isolated vertical fx of the lateral portion of the distal tibia
CRITOE
Capitullum - 1 YOA Radial head - 3 Internal - 5 Trochlea - 7 Olecranon - 9 External - 11
MRI appearance of DOMS is similar to
Grade 1 Sprain of muscle
MC muscle to herniate
Tibialis anterior
What is found in the urine of a patient with rhabdomyolysis
Myoglobulin
Metaphyseal avulsion Fx, abN copper metabolism and blue sclera
Menke syndrome (Kinky hair syndrome)
2 MC anterior GHJ dislocation
MC - Subcoracoid, 2nd MC - subglenoid
Humeral position with posterior GHJ dislocation
Internal
Rockwood IV AC
Dis clav goes posterior into the trap
Rockwood V AC
Superior dislocation with with deltoid and trap rupture
Rockwood VI AC
Clavicle goes below the acromion/coracoid
Which condyle is MCly affected in a condylar fx
Lateral
MC epicondyle to Fx
Medial
Def Posadas Fx
Eponymous name for a transcondylar fx at the elbow, with the distal fragment translating anteriorly
Monteggia BADO 1 Fx
MC (60%) Fracture of the proximal or middle third of the ulna with anterior dislocation of the radial head (most common in children and young adults)
Monteggia BADO 2 Fx
3nd MC Fracture of the proximal or middle third of the ulna with posterior dislocation of the radial head (70 to 80% of adult Monteggia fractures)
Monteggia BADO 3 Fx
2nd MC (20%) Fracture of the ulnar metaphysis (distal to coronoid process) with lateral dislocation of the radial head
Monteggia BADO 4 Fx
Fracture of the proximal or middle third of the ulna and radius with dislocation of the radial head in any direction
Mason type 1
Non-displaced radial head Fx
Mason type 2
radial head fracture with >2mm displacement or angulation
Mason type 3
Comminuted, displaced radial head fx
Mason type 4
radial head fx with elbow disloaction
Normal Scapholunate angle and what is it in DISI
30-60 degrees and >70 in DISI
Normal capitolunate angle and what is it in VISI
<30 and >30 in VISI
TFCC palmar classification explained
Class 1 = traumatic
Class 2 = Degenerative
Displacement of the PROXIMAL fragment position with femoral diaphysis Fx
Ab, Flex, ER
Displacement of the DISTAL fragment position with femoral diaphysis Fx
Medial
MC tibial plateau Fx and what is the classification
isolated lateral (75-80%), Schatzker (Type 2 is MC)
Des Powers ratio
ids C0/C1 disassociation. Basion-Post arch/Opisthion to anterior arch. ratio should be ~0.77. >1.15 = disassociation
MC Fx of C2
Dens Type 2
2nd MC fx of C2
pars
MC location of facet dislocation
C6-7
TT for pillar view
35 degrees caudad
Spondylolisthesis Type 1
Dysplastic/congenital
Spondylolisthesis Type 2
Isthmic/fatigue Fx
Spondylolisthesis Type 3
Degenerative
Spondylolisthesis Type 4
Traumatic (other than pars)
Spondylolisthesis Type 5
pathologic
Spondylolisthesis Type 6
Iatrogenic
Top 2 MC Spondylolisthesis Types
Types 2 and 3
3 anatomic types of carpal instability
- lateral (b/w scaphoid and lunate)
- Medial (b/w triquetrum and lunate or triquetrum and hamate)
- Proximal (b/w radiocarpal)
Tendons involved in dequervain syndrome
AB PL and Ex PB
GCTTS have calcification?
No, hemosiderin deposition
Yoyo string appearance
UCL with stener lesion
magic angle phenomenon is seen on what pulse
T1
MC location for glenoid labrum AbN
11-3 oclock
Buford complex
MGHL is cord-like and no anterosuperior glenoid labrum
Anterior humeral instability is related to which ligament
Ant Band of IGHL
Def Perthes
Ant labrum is lifted off with sleeve of periosteum (not torn)
Def ALPSA
Anterior labroligamentous periosteal sleeve avulsion. With disruption of the periosteum
SLAP lesions 1 - 4
1 - Degenerative fraying
2 -MC. Separation of the superior glenoid labrum and LHBT
3 - Bucket-handle tear without extension into the LHBT
4 - Bucket-handle tear with extension into the LHBT
SLAP 5 -10
type V: anterior-inferior Bankart lesion in continuity with a type II SLAP lesion
type VI: combination of a type II SLAP lesion and an unstable labral flap either anterior or posterior
type VII: type II SLAP lesion with extension to the capsule and the middle glenohumeral ligament (MGHL)
type VIII: type IIB SLAP lesion with posterior labral extension
type IX: complete or almost complete circumferential detachment of the labrum from the glenoid
type X: superior labral tear in combination with extension to the rotator cuff interval or the superior glenohumeral ligament or the coracohumeral ligament
Meniscal cysts involve the medial or lateral
medial meniscus: posterior aspect of the posterior horn lateral meniscus (More common): anterior/anterolateral aspect of the anterior horn or the body.
Discoid meniscus involves the medial or lateral
Medial
MC loc of meniscal ossicle
Post horn of medial meniscus
Insall-Salvati ratio
Patellar dislocation. Length of the patella compared to the patellar ligament N= 0.8-1.2
Cruciate ligaments are intra/extra-synovial
extrasynovial, but intraarticular
So it the proximal LHBT
peroneal split tendon affects which tendon
Peroneus brevis
Weakest ankle ligament
ATFL
is Mortons neuroma a true neuroma
No, it is fibrotic inflammatory reaction.
Also named plantar neuromas are: 1st intermetatarsal space: Heuter neuroma
4th intermetatarsal space: Iselin neuroma
Wagstaffe-LeFort Fx
Avulsion of the medial margin of the distal fibula
Dupuytren fx
Fx of the fibula above the tib/fib ligament
MC loc for cervical flexion teardrop and ass’d with what cord injury
C5 and anterior cord syndrome (loss of motor)
MC location for cervical extension teardrop and ass’d with what cord injury
C2 and central cord syndrome
Waters projection shows
Midface = Maxillary sinus, orbital floor, nasal septum and zygoma
Caldwell projection shows
Upper face = Orbital rim, medial orbital wall and sphenoid wings
Towne projection shows
Skull base
Def tripod fx
- Diastasis of the zygomaticofrontal suture
- Post zygomatic arch fx
- Fx of inferior orbital rim/lateral maxillary wall
Def LeFort 1, 2 and 3
anterolateral margin of the nasal fossa involvement
Floating palate
if fractured, it is a type I fracture
inferior orbital rim involvement
Floating maxilla
if fractured, it is a type II fracture
zygomatic arch involvement - can entrap the temporalis mm
Floating face
if fractured, it is a type III fracture
Def Maloney’s arch
Arch b/w axillary scapular border with the humerus
Best view to see Hill-Sach deformity and for Trough sign
HS: AP-Int
Trough: AP-Ext or axillary
Boundaries of the quadrangular space and what mm atrophies with nerve impingement
Teres minor, Teres major, Long head of the triceps and Humerus.
Teres minor atrophies from axillary nerve impingement
MC artery to bleed in a pelvic ring disruption fx
Gluteal a.
Classification system for acetabular fx
Letournel
Denis classification system is used for what Fx
Sacral Fx - Depends on where the Fx line is Zone 1 is lateral to neural foramina, Zone 2 is the neural foramina and Zone 3 in mesial to the neural foramina
Hohl-Larson Classification system is for what Fx
Patella Fx
