Musculoskeletal Flashcards
Long thoracic nerve innervates which muscle? Clinical sign (1)
serratus anterior
winging of scapula
Name the fracture:
- 1 inch proximal to the radio-carpal joint
- Transverse fracture of the radius
- Dorsal angulation and impaction
Fall onto outstretched hands
Colle’s fracture
Name the fracture:
Dinner fork type deformity, AKA
Garden spade type deformity, AKA
Colle’s
Smith’s (reverse Colle’s)
Name the fracture:
Volar angulation of distal radius fragment
Caused by falling backwards onto the palm of an outstretched hand or falling with wrists flexed
Smith’s fracture
Bennett’s fracture
Name an xray finding (1)
X-ray: triangular fragment at the base of metacarpal
Name the fracture:
Intra-articular fracture at the base of the thumb metacarpal
Common in fist fights
Bennet’s fracture
- Dislocation of the proximal radioulnar joint (aka radial head) in association with an ulna fracture
- Fall on outstretched hand with forced pronation
Monteggia’s fracture
Name the fracture:
Radial shaft fracture with associated dislocation of the distal radioulnar joint
Occur after a fall on the hand with a rotational force superimposed on it.
X Rays reveal the displaced fracture of the radius and a prominent ulnar head due to dislocation of the inferior radio-ulnar joint.
Galeazzi’s fracture
RA
Name two antibodies associated with RA
- RhF
2. Anti-CCP (anti-cyclic citrullinated peptide antibody)
Behcet’s syndrome
Triad of symptoms
Genetic predisposition
Ix
- oral ulcers
- genital ulcers
- anterior uveitis
Genetics
1. HLA B51
Ix
1. Positive pathergy test - skin prick leads to ulcer/ pustule formation
Sjorgren’s syndrome
What is it?
Name two antibodies
Mx (2)
Autoimmune disorder affecting exocrine glands resulting in dry mucosal surfaces
- RhF
- Anti-RoLa
Mx
- artificial saliva and tears
- pilocarpine may stimulate saliva production
OA Xray findings (4)
- Loss of joint space
- Subchondral cysts
- Subchondral sclerosis
- Osteophytes
RA Xray findings (4)
- Loss of joint space
- Juxta-articular osteoporosis
- Periarticular erosions
- Subluxation
Bloods for bone disorders: Ca, PO4, ALP, PTH Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Normal, normal, normal, normal Low, low, high, high High, low, high, high Low, high, high, high Normal, normal, high, normal Normal, normal, normal, normal
Ca, PO4, ALP, PTH
High, low, high, high
Options Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Primary hyperparathyroidism
Ca, PO4, ALP, PTH
Low, high, high, high
Options Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Secondary hyperparathyroidism (CKD)
Ca, PO4, ALP, PTH
Normal, normal, normal, normal
Options Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Osteoporosis
Osteopetrosis
Ca, PO4, ALP, PTH
Normal, normal, high, normal
Options Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Paget’s
Ca, PO4, ALP, PTH
Low, low, high, high
Options Osteoporosis Osteomalacia Primary hyperparathyroidism Secondary hyperparathyroidism (CKD) Paget's disease Osteopetrosis
Osteomalacia
SLE
Antibodies (1)
Race
Features: (4)
- ANA
- Afro- Caribbean
Features
- Malar rash
- Discoid rash - erythematous, well demarcated rash in sun-exposed areas. Can become hyperpigmented and hyperkeratotic
- Livedo reticularis
- Non scarring alopecia
Reactive arthritis
Features Triad
Usually 4 weeks post STI
- Urethritis
- Uveitis (conjunctivitis or ant uveitis)
- Arthritis
What is dactylitis?
Swollen fat fingers/ sausage like fingers
Severe inflammation of the finger and toe joints
What is keratoderma blenorrhagica?
waxy yellow/brown papules on palms and soles
What is circinate balanitis?
Associated with which condition?
Painless vesicles on penis associated with reactive arthritis
What does the femoral nerve innervate?
S
M
Common injury
Sensory
Anterior and medial aspect of the thigh and lower leg
Motor
Knee extension, thigh flexion
Hip and pelvic fractures
Stab/gunshot wounds
What does the obturator nerve innervate?
S
M
Common injury
Sensory
Medial thigh
Motor
Thigh adduction
Anterior hip dislocation
What does the lateral cutaneous nerve of the thigh innervate?
S
M
Common injury
Sensory
Lateral and posterior surfaces of the thigh
Motor
None
Compression of the nerve near the ASIS → meralgia paraesthetica, a condition characterised by pain, tingling and numbness in the distribution of the lateral cutaneous nerve
What does the tibial nerve innervate?
S
M
Common injury
Sensory
Sole of foot
Motor
Foot plantarflexion and inversion
Not commonly injured
Popliteal lacerations, posterior knee dislocation
What does the common peroneal nerve innervate?
S
M
Common injury
Sensory
Dorsum of the foot and the lower lateral part of the leg
Motor
Foot dorsiflexion and eversion
Extensor hallucis longus
Injury causes foot drop
What does the superior gluteal nerve innervate?
S
M
Common injury
Sensory
None
Motor
Hip abduction
Injury results in a positive Trendelenburg sign
What does the inferior gluteal nerve innervate?
S
M
Common injury
Sensory
None
Motor
Hip extension and lateral rotation
Injury results in difficulty rising from seated position. Can’t jump, can’t climb stairs
Pseudogout
Name x5 RFs
- Low phosphate, low magnesium
- Acromegaly
- Wilson’s disease
- Haemochromatosis
- Hyperparathyrodism
Pseudogout
What do you seen on joint aspiration?
What do you see on xray?
Which joints are usually affected?
- Weakly-positively birefringent rhomboid-shaped crystals
- Chondrocalcinosis
- Knee, wrist, shoulder
Ottowa rules
When to get an xray
Pain in the malleolar zone AND
1. An inability to weight bear immediately AND in the ED for four steps
OR
2. Bone tenderness at the posterior edge of lateral OR medial malleolus
Pain in the midfoot zone AND
1. An inability to weight bear immediately AND in the ED for four steps
OR
2. Bone tenderness at the navicular
OR
3. Tenderness at base of the fifth metatarsal
Systemic sclerosis types (3)
- Limited
- Diffuse
- Scleroderma
Systemic sclerosis - Limited Antibodies (2) Associated with which condition? First symptom Where does scleroderma typically affect?
ANA anti-centromere Associated with CREST syndrome Raynauds first symptom Scleroderma affects face and distal limbs
Systemic sclerosis DiffuSe Antibodies (2) Where does scleroderma typically affect Systemic features (4)
ANA
anti-scl-70
Scleroderma affects trunk and proximal limbs mainly
Other effects:
- ILD - interstitial lung disease
- PAH - pulmonary arterial hypertension
- Renal disease
- HTN
Systemic sclerosis
Scleroderma - what is it?
Antibodies (1)
ANA
tightening and fibrosis of skin, can manifest as plaques
What is CREST syndrome
What disease and subtype is it associated with?
CREST syndrome: Calcinosis, Raynaud’s phenomenon, oEsophageal dysmotility, Sclerodactyly, Telangiectasia
Associated with limited systemic sclerosis
Hypersensitivities
Type I
Name two
Anaphylaxis
Atopy
Hypersensitivities
Type II
Name four
Autoimmune haemolytic anaemia
ITP
Goodpastures
Pernicious anaemia (B12)