Musculoskeletal Flashcards

(79 cards)

1
Q

Genu Varum (Bow Legs) Causes

A

Normal variant
Rickets
Osteogenesis
Blount Disease- severe progressive and unilateral

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2
Q

Genu Valgum (Knock-knees)

A

Internalleolar distance >8cm

Usually resolves spontaneously

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3
Q

Pes Planus (Flat feet) in Toddlers

A

Flatness of medial longitudinal arch
Presence of fat pad which disappears with age
Arch demonstrated standing on tip-toe or passive extension of big toe
Feature of hypermobility

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4
Q

Causes In-toeing

A

Metatarsus Varus
Medial tibial torsion
Persistent anteversion of femoral neck

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5
Q

Features Metatarsus Varus

A

Occurs in infants
Passively correctable
Heel held in normal position
Treatment if persists beyond 5 years

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6
Q

Features Medial tibial torsion

A

Occurs in toddlers
Associated with bowing o tibiae
Self-corrects by 5y
Tibia is laterally rotated less than normal in relation ot the femur

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7
Q

Features Femoral Neck anteversion

A

Presents in childhood
Corrects by age 8
Associated with hypermobility
W sitting (sit between feet with hips internally rotated)
Femoral neck is twisted more forward than normal
Osteotomy for persistent anteversion

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8
Q

MSK variations and normal ages

A
Bow Legs 1-3y
Knock-knees 2-7y
Flat feet 1-2y
In-Toeing 1-2y
Toe Walking 1-3y
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9
Q

Toe Walking

A

Common in young children
Walks normally on request
dDx: cerebral palsy, Duchenne, tightness of Achilles or inflammatory arthritis of the foot

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10
Q

Positional Talipes Features

A

Due to intrauterine compression
Mild deformity
Correctable to neutral position
Passive exercises in marked deformity

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11
Q

Talipes Equinovarus CAVE

A

Cavus Midfoot
Adductus Forefoot
Varus Hindfoot
Equinous Hiindfoot

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12
Q

Mx Talipes equinovarus

A
Plaster casting (Ponsetti method)
Corrective surgery
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13
Q

Vertical Talus Features

A

Foot stiff
Rockerbottom shape
Confirmation by Xray
Surgery required

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14
Q

Talipes Calcaneovalgus

A

Foot dorsiflexed and everted
Due to intrauterine moulding
Usually self corrects
Associated with DDH

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15
Q

Tarsal Coalition

A

Lack of segmentation between one or more bones of foot
Coalitions become symptomatic as they ossify
Foot is progressively rigid with limited foot motion
More symptomatic during preadolescence
Radiograph normal until ossified
Corrective surgery

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16
Q

Pes Cavus

A

High arched foot
Associated with neuromuscular disorders in older children
Treatment required if symptomatic

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17
Q

Late Presentation DDH

A
Hip dysplasia- requires complex Mx including surgery
Limp or abnormal gait
Asymmetry of skinfolds around hip
Limited abduction of the hip
Shortening of affected leg
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18
Q

Ix DDH

A

Neonatal screening: Barlows (dislocates) Ortolani (relocates)
Repeated at 8 w
US in high risk infants

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19
Q

Mx DDH

A

Most spontaneously stabilise by 3-6w
Pavlick Harness- hip flexed and abducted (babies <4-5m)
Cx splinting: necrosis of femoral head
Surgery if fails

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20
Q

Risk factors DDH

A
female sex: 6 times greater risk
breech presentation
positive family history
firstborn children
oligohydramnios
birth weight > 5 kg
congenital calcaneovalgus foot deformity
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21
Q

Definition of scoliosis

A

Lateral curvature of front plane of the spine

Structural scoliosis: rotation of vertebral bodies

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22
Q

Causes of scoliosis

A

Idiopathic (early <5y or late 10-14y onset)
Congenital
Secondary

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23
Q

Mx Scoliosis

A

Mild resolves spontaneously
Severity and progression determined by Xray
Bracing
Surgery if co-existing pathology

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24
Q

Torticollis (Wry neck) Causes

A
Most commonly sternomastoid tumour
Muscular spasm
ENT infection
Spinal tumour
Cervical spine arthritis
Malformation 
Posterior fossa tumour
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25
Features Sternomastoid tumour
``` Occur in first few weeks of life Mobile, non tender nodule Felt within body of sternocleidomastiod Restriction of head turning and tilting of head Resolves by 2-6m ```
26
Features Growing Pains
``` Generalised pains in lower limbs Typically 3-12y Pain in night, waking from sleep Resolves with massage/comforting Symmetrical in lower limbs No limitation of physical activity ```
27
Features hypermobility
``` MSK pain confined to lower limbs Pain worse on exercise Symmetrical hyperextension -thumbs and fingers to forearm -elbows and knees >10' -flat feet with normal arch on tiptoe -hyperextensibility of knee Recurrent mechanical joint and muscle pain Associated with: Down's syndrome, Ehler-Danlos, Marfans ```
28
Complex Region Pain Syndrome Features
Most dramatic musculoskeletal pain Usually adolescent females Typically with distraction movement is normal Localised forms typically foot and ankle Triggered by minor trauma Hyperasthesia, allodynia, cool, sweollen, mottled, flexed Diffuse forms are widespread pain with disturbed sleep Extreme exhaustion
29
Acute Onset Limb Pain dDx
``` NAI Trauma Osteomyelitis Bone Tumours Septic Arthritis ```
30
Osteomyelitis Pathology
Infection of metaphysis Most common sites distal femur and proximal tibia Haematogenous spread/direct spread from wound Usually staph aureus In sickle cells likely staph or salmonella Non-immunised possibly strep or H.influenzae
31
Osteomyeltitis Presentation
``` Markedly painful immobile limb Acute febrile illness Swelling and tenderness over site Movement causes severe pain Sterile effusion of adjacent joint More insidious presentation in infants Pelvic infection- limp or groin pain Vertebral infection- back pain Multiple foci in disseminated infection ```
32
Ix Osteomyelitis
Positive blood cultures WCC and acute phase reactants raised Initially normal Xray w soft tissue swelling Xray at 7d subperiosteal new bone formation and localised bone rarefaction US periosteal elevation MRI subperiosteal pus and purulent debris in bone Redionucleotide bone scan can localise site Xray chronic changes- periosteal reaction along lateral shaft
33
Mx Osteomyelitis
Parenteral Antibiotics for several weeks IV until clinical recovery and acute phase reactants return to normal Oral therapy for several weeks Aspiration or surgical decompression of subperiosteal space (atypical or immunodeficiency) Surgical draining if no response to Abx Resting in splint
34
Cx Osteomyelitis
Bone necrosis Chronic infection with discharging sinus Limb Deformity Amyloidosis
35
Malignancy presenting as bone pain
ALL (primarily at night) Neuroblastoma (systemic arthritis or met bone pain) Osteogenic sarcoma Ewing tumour
36
Presentation malignant bone tumours
Pain or swelling | Pathological fracture
37
Osteoid Osteoma Typical Hx
``` Pain more severe at night Improves with NSAIDs Affects boys Involves femur, tibia or spine Localised soft tissue swelling/joint effusion ```
38
Xray Osteoid osteoma
Usually diagnostic Sharply demarcated radiolucent nidus of osteoid tissue Surrounding sclerotic bone
39
dDx Painful Knee
``` Osgood Schlatter Chondromalacia Patellae Osteochondritis Dissecans Subluxation and dislocation of patella Trauma ```
40
Osgood-Schlatter Features
Sporty teens esp. football Pain and tenderness over tibial tuberosity Hamstring tightness
41
Chondromalacia Patellae Features
Softening oif patella cartilage common in teenage girls Characteristically pain walking up stairs and rising from sitting Associated with hypermobility and flat feet
42
Osteochondritis Dissecans Features
Pain after exercise | Intermittent swelling and locking
43
Suluxation of the Patella
Medial knee pain due to lateral subluxation Instability or giving way Associated with hypermobility Dislocation may occur (laterally with severe pain)
44
Red Flags for Back Pain
Young age High fever- infection Night pain/waking- osteoid osteoma Painful scoliosis- infection/malignancy Focal neurology- nerve root/cord compression Weight loss, systemic malaise- malignancy
45
Causes of back pain
Mechanical- spasm or soft tissue pain Tumours- spin in osteoid osteoma Vertebral osteomyeltitis/discitis- localised tenderness Spinal cord/root entrapment- tumour/prolapsed disc Scheuermann disease- osteochondosis of vertebral body (fixed thoracic kyphosis) Spondylolysis- stress fracture of pars interarticularis Complex region pain syndrome
46
Causes of a limp- toddlers
Toddlers: - infection - transient synovitis - trauma - malignant .e.g. leukaemia, neuroblastoma
47
Causes of a limp- child
Child: - transient synovitis - Septic arthritis/osteomyeltitis - Trauma/overuse injury - Perthes - Juvenile idiopathic arthritis - Malignancy .e.g. leukaemia - Complex region pain syndrome
48
Causes of a limp- teens
Teens: - Mechanical .e.g. overuse, trauma - SUFE - Avascular necrosis of femoral head - Reactive arthritis - Juvenile idiopathic arthritis - Septic arthritis - Osteochondritis dissecans - Bone tumour and malignancy - Complex regional pain syndrome
49
Features Transient synovitis
Children aged 2-12y Follows viral infection Sudden onset pain in hip or a limp No pain at rest Decreased range of movement , esp. internal rotation Afebrile or mild fever, but generally well
50
Features Perthes
Mainly affects boys 5-10y Insidious presentation Onset of limp or hip/knee pain
51
Ix Perthes
Xray both hips lateral and frog leg Increased density in femoral head Repeat if normal Xray but persisting symptoms Bone/MRI scan
52
Mx Perthes
Rest Physiotherapy to optimise hip movement Traction, plaster casts and surgery
53
Prognosis Perthes
<6y good prognosis Older children poor prognosis Cx: deformity of femoral head, metaphyseal damage, degenerative arthritis
54
Pathology SUFE
Displacement of epiphysis of femoral head posterior-inferiorly. Progresses to avascular necrosis
55
Features SUFE
10-15y during puberty/adolescent growth spurt Typically obese boys Association with metabolic endocrine abnormality Limp or hip pain referred to knee Restricted abduction and internal rotation of the hip
56
Mx SUFE
Internal fixation: typically a single cannulated screw placed in the center of the epiphysis
57
dDx Polyarthritis
``` Infection .e.g. sepsis, TB, virus Reactive; strep infection Inflammatory bowel disease: UC, Chron's Vasculitis: HSP, Kawasaki Haematological: Haemophilia, sickle cell Malignancy: neuroblastoma, leukaemia Connective tissue disorder: JIA, SLE, dermatomyositis, PAN, MCTD Cystic fibrosis ```
58
Features reactive arthritis
``` Transient joint swelling Usually <6w Often knee/ankle Follows extrarticular infection esp. enteric bacteria and STIs, rheumtic fever, Lyme Low grade fever Normal acute phase reactants ```
59
Features septic arthritis
``` Children <2y Single joint affected Particularly hip Staph (HiB in non-immunised) Erythematous, warm, tender joint Reduced range of movement Acutely unwell child Limb held still Peripheral joint effusion ```
60
Posturing Hip Septic Arthritis
Leg held flexed, abducted, externally rotated Pseudoparalysis Marked tenderness over head of femur Movement resisted
61
Ix Septic Arthritis
``` WCC and acute phase reactants raised Blood cultures US deep joints identifies effusion Xray excludes trauma and bony lesions - initially normal with some joint widening Aspiration under US for culture ```
62
Mx Septic arthritis
Immediate IV antibiotics Wash out of joint or surgical drainage Immobilisation
63
Juvenille Idiopathic Arthritis Features
``` Joint swelling >6w Gelling (stiffness following rest) Morning joint stiffness Pain Intermittent limp Activity avoidance Prliferation of synovium ```
64
IX JIA
Usually normal | ANA positive but not specific
65
Long-term effects JIA
Bone expansion from overgrowth - Leg lengthening - Valgus deformity - digit length discrepancy - advancement of wrist bone age
66
Cx JIA
``` Chronic anterior uveitis Flexion contractures of joints Growth failure Constitutional .e.g. anaemia, delayed puberty Osteoporosis Amyloidosis ```
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Types JIA
Oligoarthritis (persistent): 1-4 joints Oligoarthritis (extended): >4 joints after 6m Polyarthritis (RF +ve): symmetrical large and small joints Polyarthritis (RF-ve) Systemic Arthritis: acute illness and inflamamtory marker Psoriatric arthritis: psoriasis and dactylitis Enthesitis-related arthritis: Lower large joints HLAB27+ Undifferentuated: >2 subtype feature
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Mx JIA
Induction of remission NSAIDs and analgesia Joint injection under US, with sedation Methotraxate: weekly dose and regular bloods Systemic corticosteroids: pulsed IV prednisolone -life saving in macrophage activation syndrome Cytokine modulation .e.g. anti-TNF, IL-1, CTLA-4, IL-6
69
Features Achondroplasia
``` AD inheritance Short stature Marked limb shortening Large head and frontal bossing Depression of nasal bridge Short and broad hands Lumbar lordosis ```
70
Thanatophoric dysplasia Features
``` Results in still birth Large head Short limbs Small chest Xray- characteristically curved femurs Sporadic inheritance ```
71
Cleidocranial dysostosis Features
``` AD inheritance Absence of clavicles Delay in closure of anterior fontanelle Delayed ossificatrion of skull Child can touch shoulders at the front of the chest Short stature ```
72
Arthrogryposis Features
Stiffness and contractures of the joints Associated with oligohydramnios, chromosomal abnormalities, and widespread abnormalities Usually sporadic Marked flexion contractures of the knees, elbows, and wrists Dislocation of the hips Talipes Equinovarus and socliosis common Thin skin with reduced subcut tissue Marked muscle atrophy around affected joints Impaired walking in severe forms
73
Mx Arthrogryposis
``` Phsyiotherapy Correction of deformities -splints -plaster casting -surgery ```
74
Osteogensis imperfecta Features
``` Bone fragility: bowing and fractures Fractures in childhood Blue sclerae Development of hearing loss Type 2: fatal, multiple fractures before birth ```
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Mx Osteogenesis Imperfecta
Bisphosphonates to reduce fractures | Splinting of fractures to reduce deformity
76
Osteopetrosis Features
``` RARE Dense but brittle bones Faltering growth Recurrent infection Hypocalcaemia Anaemia Thrombocytopenia Poor prognosis ```
77
Mx Osteopetrosis
Bone marrow transplantation can be curative
78
Marfan's syndrome Features
``` Tall stature Long thin digits (arachnodactyly) Hyperextensive joints High arched palate Dislocation of lenses of eyes (usually upwards) Severe myopia Altered body proportion (lower>>upper) -lower segment (pubis to soles) -upper segment (crown to pubis) Arm span greater than height Chest deformity Scoliosis ```
79
Cx Marfans Syndrome
``` Cardiovascular: -degeneration of media of vessel walls Dilated incompetent aortic root -valvular incompetence -mitral valve prolapse and regurgitation -aneurysm of aorta (risk dissection/rupture) Monitor by echo ```