MSK Flashcards
What is genu varum
Bow legs (knees far apart, legs bowed)
What are pathological causes of gene varum
Rickets Blount disease (condition in black children, unilateral)
What is genu valgum
knees close when standing, feet far apart
Intermalleolar distance >8cm
What is flat feet
aka pes planes
flat medial longitudinal arch (normal before child walks, because of fat pad under foot)
What are three main causes of intoning
Metatarsus varus (forefoot adduction)
Medial tibial torsion
Femoral anteversion
What is the latin name for clubfoot
Talipes equinovarus
What is the cause of clubfoot
oligohydramnios
deformity in utero, from intrauterine compression
OR malformation
OR neuromuscular disorder
What is the foot like in clubfoot
inverted
supinated
in plantar flection
How do you treat clubfoot
Ponseti method (plaster casing and bracing)
Surgery may be required if severe (Achilles tenotomy)
What is vertical talus like
Foot is stiff
Rocker bottom foot
What is pet cavus
High arched foot
Associated with neuromuscular disorder e.g. Friedrich Ataxia
What is scoliosis
lateral curvature of the spine
What is the dangerous complications scoliosis
cardiorespiratory failure
from distortion of the chest
What is torticollis
WRY neck
- restriction of head turning
- mobile, non-tender nodule (felt within SCM)
W
What is the most common cause of torticollis
SCM tumour
What are chromosomal causes of hypermobility
Downs
Marfans, Ehler Danlos
What is complex regional pain syndrome
Musculoskeletal pain of unknown origin
Who does complex regional pain syndrome occur in
teenage females
What kind of pain is experienced in complex regional pain syndrome
Extreme / incapacitating
may be locatlised on foot and ankle
Hyperanaestheisa
allodynia
What is osteomyelitis
infection of metaphysis of long bones (e.g. femur, tibia)
What does osteomyelitis arise from
Haematogeneous spread
Direct spread from infected wound
What are pathogens causing osteomyelitis
S aureus
Streptococcus
H influenza
What are features of osteomyelitis
painful, immobile limb
swelling and tenderness over site
movement cause s èpain
acute febrile illness
What investigations do you do for osteomyelitis
Blood cultures (+ve) WCC, CRP X rays (normal until 7-10 days, when you get new bone formation) MRI Radionucleotide bone scan
What is management for acute osteomyelitis
high dose IV antibiotics
surgical debridement
What are the two most malignant types of bone tumour
Ostoegenic sarcoma
Ewing tumour
What is Osgood-Schattler Disease
Osteochondritis of patellar tendon insertion at the knee
Who does Osgood-Schattler Disease affect
Adolescent males who are very physically active
What are key symptoms of Osgood-Schattler Disease
knee pain after exercise
localised tenderness
swelling over tibial tuberosity
What is management for Osgood-Schattler Disease
Stop sporting activity
Pain relief (NSAID, paracetamol, ice packs)
What is chondromalacia patellae
Softening of thew articular cartilage of the patella, affecting adolescent females
What is osteochondritis dissecans
avascular necrosis of subchondral bone
What is Perthes disease
Avascular necrosis of the capital femoral epiphysis due to interruption of blood supply
Followed by revascularisation and reossification over next 2 years
What is reactive arthritis
Transient joint swelling following extra-articular infection
What causes reactive arthritis
Enteric bacteria (salmonella, shigella, campylobacter) STI (chlamydia, gonorrhoea)
How do you treat reactive arthtritis
You DON’T - SELF RESOLVING
What is septic arthritis
Serious infection of the joint that can lead to bone destruction
How do you treat septic arthritis
Prolonged course of antibiotics (IV 2 weeks, oral 4 weeks)
What is juvenile idiopathic arthritis
persistent joint swelling >6 weeks presenting before 16 years of age in absence of any other causes
How do you classify JIA
Polyarthritis >4 joints
Oligoarthritis <4 joints
What are clinical features of JIA
Gelling (stiffness after rest)
Morning stiffness
Joint pain, swelling
Intermittent limp
What investigations should you consider for JIA
ANA
How do you manage JIA
Specialised paeds rheum clinic
NSAIDS
Corticosteroids
DMARD (methotrexate PO/SC)
What is achondroplasia
short stature
short limbs
large head with frontal bossing
pincer grip
What is thanatophoric dysplasia
results in stillbirth
large head, very short limbs
What is arthrogyposis
stiffness and contractor of joints
What is the difference in presentation between Osgood-Schattler and Chondromalacia Patellae
OSD: males, knee pain after lots of exercise
chondromalacia patellae: females, anterior knee pain on rising from sitting, walking upstairs
What is another differential for knee pain after exercise
osteochondritis dissecans
What is the presentation of Perthes disease
5-10 year olds limp / knee pain Pain worse after exercise Reduced range of movement stiffness One leg shorter than other
How do you investigate Perthes
Bilatera x ray (widening of joint space, m decrease in femoral head size)
Bone scan, MRI
How do you manage Perthes disease
Acute pain with analgesia
<5yo good prognosis from observation only
>5yo consider surgery
what is pathophysiology of Slipped Capital Femoral Epiphtysis
fracture through growth palate of femur > slippage of femoral ahead epiphysis poster-inferiorly
what is classic person that will present with Slipped Capital Femoral Epiphysis
Obese teenager
Other metabolic abnormality (hypothyroid, hypogonad)
10-15 year old
What is presentation of Slipped Capital Femoral Epiphysis
gradual onset limp
hip or knee pain
pain on abduction and internal rotation, restricted movements
How do you confirm Slipped Capital Femoral Epiphysis diagnosis
Bilateral hip X ray (AP + frog view)
How do you manage Slipped Capital Femoral Epiphysis
DONT LET THE PATIENT WALK
analgesia
immediate ORTHO REVIEW
Surgical repair: internal fixation
What is pattern of inheritance for achondroplasia
AUTOSOMAL DOMINANT
So in GoT one parent must’ve been a dwarf also !!
What children need to have an USS at 6 weeks to check for DDH?
Breech presentation at 36/40 (regardless of presentation at delivery) Breech delivery (incl <36/40) Family history of DDH
when do you change from USS to X ray for DDH
6 months
What DMARD is first line in JIA
Methotrexate
how do you manage patient with rickets
if vit D deficient: daily calcium + ergocalciferol / cholecalciferol
what X ray finding do you see in SCFE
Thethowan’s sign: line of Klein does not interset superior femoral epiphysis
what is the most common cause of acute hip pain in children, and when does it occur
transient synovitis
often with / after viral infection
what are symptoms of transient synovitis
sudden onset pain in the hip / limp
no pain at rest
decreased range of movement
mild febrile / afebrile
What is still’s disease?
Arthritis with SALMON PINK RASH
+ pyrexia, uveitis, anorexia, WL
essentially a systemic form of JIA
what rash do you get in juvenile dermatomyositis
helkiotropid discoloration of eyelids
erythema over bridge of nose
what are findings on X ray of Perthes
widening of joint space
then decreased femoral head size
what are findings on X ray of SCFE
Trethowan’s sign: lines of klein does not intersect femoral head
what criteria can you use to differentiate septic arthritis from transient synovitiss
KOCHER’s CRITERIA
What are Kocher’s criteria
- Fever >38.5
- refusal to bear weight on affected side
- Raised ESR/CRP
- Raised WCC