Disease Profiles: Growth and Developmental Disorders Flashcards
What is osteochondritis dissecans?
An area of the surface of the knee loses its lood supply and cartilage +/- bone can fragment off
What is transient synovitis?
Self-limiting inflammation of the synovial of a joint, most commonly the hip
Name two tests for developmental dysplasia of the hip
Barlow’s test, Ortolani’s test
Name 3 signs of developmental dysplasia of the hip
Asymmetry, loss knee height, less abduction in flexion
What patient group is most likely to develop transient synovitis?
Typical age is between 2 and 10, boys are more commonly affected than girls
How can you identify a fracture of the growth plate?
Epiphysis will not be centred on the metaphysis
What is Duchenne Muscular Dystrophy?
Rare x-linked disorder that leads to progressive muscle wasting
When may a baby with developmental dysplasia of the hip present?
Neonatal baby checks, selective US screening, 6-8 week GP check, when starts to walk (late presentation)
What is Erb’s palsy?
Most common type of obstetric brachial plexus palsy involving injury to the upper (C5 + C6) nerve roots
Motor innervation of the deltoid, supraspinatus, infraspinatus, biceps and brachilais muscles is lost
What is skeletal dysplasia?
Medial term for short stature
At what age does a child’s knees reach their normal physiological valgus of 6°?
7-9 years
What is Klumple’s palsy?
Lower brachial plexus injury (C8 + T1 roots) caused by forceful adduction
Results in paralysis of the intrinsic hand muscles +/‐ finger and wrist flexors and possible Horner’s syndrome
What is Barlow’s test?
Test for developmental dysplasia - flex and adduct the hip, sign is positive if hip dislocates posteriorly
Which patient group is most likely to develop osteochondritis dissecans?
Most common in adolescence
Describe the clinical presentation of Klumple’s palsy
Fingers are typically flexed (due to paralysis of the interossei and lubricals)
What feature of normal anatomy may give the appearance of slight in-toeing?
Excess femoral neck anteversion (pointing forward)
Why are children more amenable to conservative fracture management?
Increased modelling potential
What is mixed hip impingement?
Combination of CAM and pincer type
Describe the examination findings of a child with Perthes disease
Loss of internal rotation is usually the first clinical sign followed by loss of abduction and later on a positive Trendellenburg test from gluteal weakness
Describe the clinical presentation of autosomal recessive osteogenesis imperfecta
Either fatal in the perinatal period or associated with spinal deformity
What is developmental dysplasia of the hip?
Involves dislocation or subluxation of the femoral head during the perinatal period which affects the subsequent development of the hip joint
Describe the management of patellar tendonitis
Self‐limiting, requires rest and possibly physiotherapy
What is Ortolani’s test?
Test for developmental dysplasia - flexion and abduction reduces femoral head into acetabulum
By what age do the majority of cases of bow legs or knock knees resolve?
10
What is Osgood-Schlatter’s disease?
Traction apophysities at tibial tubercle - insertion of patellar tendon into tibial tuberosity
What can cause rigid flat feet?
Underlying bone abnormality, underlying inflammatory or neurological disorder
What is Femoroacetabular Impingement Syndrome (FAI) (Hip Impingement)
Altered morphology of femoral neck and/or acetabular (additional bone growth) which causes abutment of the femoral neck on the edge of the acetabulum during movement
Describe the pathophysiology of Perthes disease
The femoral head transiently loses its blood supply resulting in necrosis with subsequent abnormal growth
Degree of joint collapse and joint remodelling will determine whether the joint remains congruent
Incongruent = early onset arthritis
What is a torus (buckle) fracture?
Crease of the bone and periosteum
Describe the management of osteogenesis imperfecta
No cure - only fracture fixation, surgery to correct deformities, bisphosphonates may have benefit in teenage years
Fractures tend to heal with abundant but poor quality callus and are treated with splintage, traction or surgical stabilization
Describe the management of Perthes disease
No specific treatment other than regular xray observation and avoidance of physical activity
What is osteogenesis imperfecta?
Commonly known as brittle bone disease
Genetic defect of the maturation and organization of type 1 collagen (which accounts for most of the organic composition of bone)
Describe the clinical presentation of transient synovitis
Limp/reluctance to weight bear on the affected side, range of motion may be restricted, may be low grade fever but child is not systemically unwell
Describe the management of late developmental dysplasia of the hip
Closed or open reduction and hip spica
For children 18 months+ more likely to be OR
Describe the surgical management of osteochondritis dissecans
If not yet detached - pin in place
If detached - fix or remove
May consider cartilage regeneration for persistent pain
When may an osteotomy be indicated in Slipped Upper Femoral Epiphysis (SUFE)?
Chronic severe slips
Describe the management of Femoroacetabular Impingement Syndrome
Observation, conservative measures
Surgical options
Why is a USS for developmental dysplasia of the hip less helpful after 3 months?
Osification nucleus begins to develop
Describe the prognosis of Perthes disease
50% of cases do well, can cause abductor muscle weakness (Trendellenburg positive), occasionally the femoral head may sublux requiring an osteotomy
What is club foot (talipes equinovarus)?
Condition in which a newborn’s foot or feet appear to be rotated internally at the ankle
Describe the clinical presentation of autosomal dominant osteogenesis imperfecta
Multiple fragility fractures of childhood, short stature with multiple deformities, blue sclerae, dentinogenesis imperfecta, loss of hearing
Describe the normal knee alignment at birth
Varus knees (bow legs)
What is patellofemoral pain syndrome?
Anterior knee pain which is generally idiopathic, aka idiopathic adolescent anterior knee pain, chondromalacia patellae
Describe the management of patellofemoral pain syndrome
Majority of cases are self-limiting, physio needed to rebalance the muscles
Most patients ‘out grow’ the condition
Resistant cases may require surgery (tibial tubercle transfer)
What is in-toeing?
Refers to a child who, when walking and standing will have feet that point toward the midline
Why do patients with Marfan’s syndrome rarely require orthopaedic surgery and soft tissue stabilisation?
Results usually disappointing as the biological abnormality cannot be corrected
Describe the pathophysiology of Slipped Upper Femoral Epiphysis (SUFE)
The growth plate (physis) is not strong enough to support body weight and the femoral epiphysis slips due to the strain
Why do children’s bones ‘bend or bow’ when they fracture rather than ‘snap and splinter’?
The periosteum of children’s bones is very thick
Name a complication of growth plate injury
Growth deformity
Describe the prognosis of Slipped Upper Femoral Epiphysis (SUFE)
The greater the degree of slip the worse the prognosis and some cases may require hip replacement in adolescence or early adulthood
Where should you immobilise a diaphysial fracture in a child?
Joint immobilised above and below to prevent rotation
What is the preferred investigation for developmental dysplasia of the hip after 4-6 months?
X-ray
Name 2 issues with bone surgery in patients with Ehlers-Danlos syndrome
Bleeding can be a problem, skin healing can be poor
What is the preferred investigation for developmental dysplasia of the hip before 3 months?
USS
Which investigations would you perform in suspected transient synovitis?
Mainly to rule out other causes: x-ray (Perthes disease), CRP (septic arthritis), aspiration of the hip (if still considering septic arthritis), MRI (osteomyelitis of proximal femur)
Name 3 potential causes of genu varum or valgum
Underlying skeletal disorder, physeal injury with growth arrest, biochemical disorder (rickets)
Describe the examination findings in Femoroacetabular Impingement Syndrome
C sign positive, FADIR provocation test positive
Describe the appearance of a valgus deformity
Knock knee appearance with a larger gap than normal between the feet/ankles
Where should you immobilise a metaphyseal fracture in a child?
Adjacent joint immobilised