MSK Flashcards
Which acronym should be used to ensure you don’t miss anything during MSK consultation?
TIM
Tumour, trauma
Infection, inflammation
Mechanical, muscle disease, metabolic
What is bone matrix composed mostly of?
type 1 collagen
How can bone anatomy/structure be divided?
diaphysis
proximal and distal metaphysis, distal and proximal epiphysis, separated by growth plate/physis during childhood
What are the three types of joints?
fibrous- sutures of skull
cartilaginous- symphysis pubis
synovial- skeletal joints
Define enthesis
point of insertion of a tendon, ligament, fascia, joint capsule into bone
What is Gower’s sign?
use of hands to splint legs to rise from sitting. Sign of muscular weakness
In which condition is Gower’s sign common?
DMD
Around what age does normal adult pattern of gait become established?
around 7
List three signs of malignant leg pain?
nocturnal (benign is also nocturnal)
deep boring pain unresponsive to pain relief
altered function
unilateral
persists in day time
List three features of benign leg pain
nocturnal
wakes from sleep but return to sleep with analgesia
quickly resolves with massage, analgesia
functionally normal the next day
bilateral
relationship to exercise
Three differentials for malignant bone pain?
Bone tumour
Leukaemia
Neuroblastoma
Name two organisms implicated in septic arthritis
staph aureus
strep pneumoniae
haemophilus influenza
What may be the source/focus of septic arthritis in a child?
septicaemia, pharyngitis, meningitis, cellulitis
How can you distinguish between a transient synovitis/reactive arthritis and septic arthritis in a child?
if all of the following features present then likely septic arthritis:
pyrexia within the last week
inability to weight bear through that limb
raised ESR
WBC>12
Does a normal plain radiograph exclude osteomyelitis?
no as changes occur late
List three features of osteomyelitis presentation
pyrexia
local erythema and tenderness
acutely unwell
night pain
limp
recent infection
Which infection is associated with osteomyelitis?
varicella zoster, due to introduction of s aureus by scratching- haematogenous spread
TB also
What is the fastest diagnostic method for TB?
PCR
List three other differentials for infectious causes of joint swelling in children other than reactive arthritis
rheumatic fever
HLA B27 associated reactive syndrome (Reiter’s syndrome)= reactive arhtritis
transient synovitis of the hip
List three features of rheumatic fever
carditis, arthritis, rash
What is the cause of rheumatic fever
strep infection
List two features of Reiter’s syndrome
urethritis, arthritis, conjunctivitis
What is the cause of transient synovitis of the hip?
idiopathic
Which age group are affected by synovitis of the hip?
3-10
What are the two views of X-rays?
lateral and AP (coronal)
How is dislocation described in terms of anterior or posterior?
relative to most distal part of fracture e.g. distal segment humerus is shifted/separated posterior to the shaft of the humerus
Important aspects of examination when suspected fracture?
pulses, CRT, movement, sensation
Which is the most common fracture in children?
supracondylar
Two risks associated with supracondylar fractures?
damage to neurovascular bundle
cubitus varus