Children's Congenital and Neuromuscular Conditions Flashcards

1
Q

What are some examples of congenital conditions?

A

Clubfoot (CTEV), rocker bottom feet (CTV), neurofibromatosis, skeletal dysplasia

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2
Q

What are some examples of neuromuscular conditions?

A

Cerebral palsy, tip toe walking, Duchenne muscular dystrophy, high arch (cavus) foot

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3
Q

What is the clinical name for clubfoot?

A

Congenital talipes equinovarus (CTEV)

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4
Q

What is clubfoot?

A

Birth defect causing abnormal foot posture = majority idiopathic, associated with myelomeningocoele, diastrophic dwarfism and tibial hemimelia

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5
Q

What are some features of clubfoot?

A

2:1 male to female ratio, half of cases are bilateral, causes cavus, adductus, varus and equinus

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6
Q

What causes the postural talipes which occurs in clubfoot?

A

Ankle muscle tightness and the position of the baby in the womb

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7
Q

How is clubfoot treated?

A

Ponesti method = child wears corrective cast to move foot into correct position, may also get Achilles tenotomy

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8
Q

What is the clinical name for rocker bottom foot?

A

Congenital vertical talus (CTV)

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9
Q

What are some features of rocker bottom foot?

A

Irreducible dislocation of talus on navicular, round plantar surface, equinus hindfoot

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10
Q

What are some associations of rocker bottom foot?

A

Myelomeningocoele, arthrogryposis, spinal muscular atrophy, neurofibromatosis, trisomies

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11
Q

What kind of ankle disorder are clubfoot and rocker bottom foot?

A

Fixed ankle equinus

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12
Q

What is neurofibromatosis?

A

Congenital disorder affecting extremities, spine (scoliosis >10%) and skin (neurofibromas)

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13
Q

What genes are involved in neurofibromatosis?

A

NF1 is most common = neurofibromin, chromosome 17

AD gene = Alzheimer’s disease

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14
Q

What is needed to diagnose neurofibromatosis as per the NIH guidelines?

A
2 out of 7 of the following:
>6 café au lait spots
>= neurofibromas/plexiform neurofibromas
Freckling axilla/inguinal region
Optic glioma
Cortical thinning/pseudoarthrosis
Fist degree relative affected
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15
Q

What are skeletal dysplasias?

A

Congenital disorders involving the bone and cartilage (436 disorders e.g achondroplasia)

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16
Q

What are some features of skeletal dysplasia?

A

Shortening of bone, short stature (usually < 2SD), changes may be proportionate or disproportionate

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17
Q

How are skeletal dysplasias characterised using the Wynne-Davies classification?

A

According to area of bone affected or pathology

18
Q

What receptor is involved in achondroplasia?

A

Fibroblast growth factor receptor 3 (FGFR3) = AD gene can be involved, 80% are spontaneous mutations

19
Q

What are some features of achondroplasia?

A

Normal trunk and short limbs, frontal bossing, genu varum, normal intelligence, motor delay

20
Q

What is cerebral palsy?

A

Non-progressive neuromuscular disorder = injury to immature brain (prematurity, perinatal infection/anoxic injuries/meningitis)

21
Q

What are the features of cerebral palsy?

A

UMN disease causing muscle weakness/spasticity
Early disease = abnormal muscle forces causing dynamic deformity
Late disease = contractures, fixed deformity, dislocation

22
Q

What are the different classifications of cerebral palsy?

A
Hemiplegia = regional involvement, pyramidal, spastic
Diplegia = regional involvement, spastic, pyramidal
Quadriplegia = global involvement, spastic, pyramidal
Athetoid = extrapyramidal, dyskinetic, global involvement
Dystonic = global involvement, dyskinetic, extrapyramidal
Ataxic = extrapyramidal, ataxia, global involvement
23
Q

What is the clasp knife reflex that occurs in cerebral palsy?

A

Golgi tendon reflex, rapid decrease in resistance when attempting to flex a joint

24
Q

What are the functional classifications of cerebral palsy?

A
Walking = GMFCS level I to III
Non-walking = GMFCS level IV to V
25
Q

What are some features of Duchenne muscular dystrophy?

A

Commonest muscular dystrophy, inherited disorder causing progressive muscle weakness, presents in children ages 2-5, muscle weakness (proximal>distal), clumsy walking, positive Gower’s sign, scoliosis

26
Q

What causes Duchenne muscular dystrophy?

A

Absence of dystrophin protein causes muscle replacement with fibrofatty tissue = 1/3 cases are spontaneous, usually X-linked recessive inheritance in boys

27
Q

How is Duchenne muscular dystrophy diagnosed and treated?

A
Diagnosis = CPK, muscle biopsy (absence of dystrophin)
Treatment = keep ambulatory, decrease contractures
28
Q

What is cavus foot?

A

Pes cavus = high arched foot

Elevated longitudinal arch and varus hindfoot

29
Q

What causes cavus foot?

A

Idiopathic or familial, most due to neurological disorder (polio, cerebral palsy, myelomeningocoele, SCI), Charcot Marie tooth (myelin protein 222)

30
Q

How is cavus foot assessed and managed?

A
Assessment = x-rays, coleman block test
Management = conservative or surgery, soft tissue or bony (osteotomies)
31
Q

What does a high GMFCS classification of cerebral palsy increase the risk of?

A

Dislocation

32
Q

What are some features of spinal fusion surgery?

A

Given when Cobb angle > 45 degrees, T2 is fused to pelvis, major undertaking at tertiary spinal centre, usually given in early adolescents to protect respiratory function

33
Q

What does normal motion depend on?

A

Appropriate and adequate force acting via a rigid lever of appropriate length on a stable joint

34
Q

What provide the required force for motion during ambulation?

A

Muscles and ground reaction forces

35
Q

What provides the rigid lever arm for forces during ambulation?

A

The skeleton

36
Q

What are the priorities of normal gait?

A

Stability in stance, clearance in swing, pre-position of foot in terminal swing, adequate step length, conservation of energy

37
Q

What are some features of tip toe walking?

A

Usually occurs in children aged 3, causes may be CNS, PNS, muscular or idiopathic

38
Q

What are some features of growing pains?

A

Common, more common in females, usually bilateral, don’t cause a limp

39
Q

What are some red flags for leg pain?

A

Asymmetry, good localisation, short history, persisting limp, not thriving, pain worsening

40
Q

What are some features of anterior knee pain?

A

More common in females, adolescents, localised patellar tenderness, usually during squats or going down stairs, check hips, investigate with radiographs, treat with physio