MSK Flashcards
Best imaging for osteomyelitis?
MRI
Risks for septic arthritis?
IVDU
DIabetes
Rheumatoid or osteo
Prostheses
Septic arthritis symptoms?
Short history of symptoms
Fever
Hot swollen tender joint with restriction
First line investigations to diagnose septic arthritis?
Aspiration of synovial fluid for gram stain and culture also look for crystals
Blood cultures also- Preferably before ABX
Causative organisms in septic arthritis?
Overall Staph Aureus is the most common but
Young sexually active - ~75%Gonococcal
Septic arthritis treatment?
Washout ABX and aspirate to dryness as often as possible/needed
Symptoms of GCA?
>50 and female usually
Headache, PMR symptoms, claudication cranial vessel tenderness
Low grade fever and fatigue systemically unwell
PainLESS loss of vision
pain on chewing
Investigations initially in to GCA?
ESR, CRP, FBC,LFTS
Artery biopsy
ESR raised often >50mm
CRP↑
Anaemic (normocytic)
Treatment of GCA doses etc referall?
visual symptoms — 60 mg as a one-off dose (they should be seen by an ophthalmologist the same day).
without visual symptoms — 40 to 60 mg daily (minimum 0.75 mg/kg)
If not contraindicated- Aspirin 75mg
Don’t forget the PPI
Additional preventative medications when using steroids?
PPI and bone protection
Pain in which part of the spine is a red flag?
Thoracic
Cauda equina red flags and questions?
Severe low back pain, Sciatic, saddle anaesthesia
Bladder problems -incontinence or retention (when did you last urinate/open bowels?)
Bowel sphincter weakness can you tense
Shortened and externally rotated leg, diagnosis? Other symptoms?
Likely #NOF
Pain, cannot weight bear pain with hip movement
Risks for hip fracture?
Female sex, osteoporosis, falls, low BMI
Imaging of chocie in hip fracture?
Plain X-ray
Undisplaced hip fracture treatment?
Internal fixation or hemisrthroplasty if unfit
Displaced hip fracture treatment?
young and fit i.e. <70 years- Reduction and internal fixation (if possible).
older and reduced mobility- Hemiarthroplasty or total hip replacement.
Extracapsular hip fracture treatment?
dynamic hip screw
if reverse oblique, transverse or subtrochanteric: intramedullary device
What type of fracture if this?
Treated?
Intertrochanteric
Likely dynamic hip screw as extracapsular
Strongly suspect hip fracture but X-ray normal next investigation?
MRI
When to consider internal fixation of hip fractures?
Displaced (if possible) or Undisplaced, intracapsular and young <70
What is this fracture?
Treatment?
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Intracapsular fracture of left hip
Hemiarthroplasty if elderly and immobile Total replacement if able and well
Offer THR rather than hemi to patient with undisplaced intracapsular and…
were able to walk independently out of doors with no more than the use of a stick and
are not cognitively impaired and
are medically fit
VTE prophlaxis in hip fractures?
1 month of LMWH starting 6-12hrs after surgery
Common symptoms of compartment syndrome?
Pain- Severe and disproportianate to the injury and on passive stretching
history of surgery or sports playing/trauma
Tightness
Paraesthesia
Pulselessness pallor and paralysis are late and uncommon
Loss of cartilage, sclerosis and eburnation of the subchondral bone, osteophytes, and subchondral cysts Characteristic of?
Osteoarthritis
What features are seen on this xray?
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Osteophytes Distally (heberdens)
Base of thumb also,
asymmetrical joint space narrowing
Xray features in Rhematoid arthritis?
joint space narrowing: symmetrical or concentric
fusiform and periarticular; it represents a combination of joint effusion, oedema and tenosynovitis 5
PIP and MCP joints (especially 2nd and 3rd MCP)
ulnar styloid
triquetrum
As a rule the DIP are spared
What is seen and diagnosis?
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Rheumatoid arthritis
- Sparing of DIPs
Joint space symetrically loss in MCP joints wrist changes
Subchondral cysts Ulnar styloid involvement
L4 nerve root?
Foot inversion and dorsiflexion
Foot eversion and toe plantarflexion nerve root?
S1
Great toe dorsiflexion nerve root?
L5
Management of lower back pain with no red flags?
Analgesia: paracetamol ± NSAIDs ± codeine Muscle relaxant: low-dose diazepam (short-term) Facet joint injections
Symptoms of Osteoarthritis?
Pain: worse with movement, background rest/night pain, worse @ end of day. Stiffness: especially after rest, lasts ~30min (e.g. AM) Deformity
Conservative management of OA?
↓ wt. Alter activities: ↑ rest, ↓ sport Physio: muscle strengthening Walking aids, supportive footwear, home mods
Medical management of OA?
NSAID/topical, Paracetamol, topical capcaisin (hand or knee)
Surgical management of OA
Arthroscopic washout: esp. knee. Trim cartilage, remove foreign bodies. Arthroplasty: replacement (or excision)
Monitor disease activity in RA?
DAS28
Bloods in RA?
RF +ve in 70%
Anti-CCP: 98% specific (Ag derived from collagen) ANA: +ve in 30%
FBC anaemia, ↓PMN, ↑plat, ↑ESR, ↑CRP
Extra articular manifestations of RA?
Carpal Tunnel Syndrome Pulmonary
Fibrosing alveolitis (lower zones)
Pleural effusions (exudates) Ophthalmic
Epi-/scleritis
Sjogren’s Syndrome
Raynaud’s
Diagnosis of RA?
- Morning stiffness >1h (lasting >6wks)
- Arthritis ≥3 joints
- Arthritis of hand joints
- Symmetrical
- Rheumatoid nodules
- +ve RF
- Radiographic changes
Need 4/7
Mainstay agents in RA?
DMARDS
Methorexate: hepatotoxic, pulmonary fibrosis
Sulfasalazine: hepatotoxic, SJS, ↓ sperm count
Hydroxychloroquine: retinopathy, seizures
Leflunomide
Then Biological (Anti TNF)
Gout Pathophysiology?
Deposition of monosodium urate crystals in and around joints → erosive arthritis
Urate deposits in pinna and tendons called?
Tophi
Gout differentials
Septic arthritis Pseudogout Haemarthrosis
Microscopy of gout aspirate?
Polarised light microscopy Negatively birefringent needle-shaped crystals
Acute gout treatment? Pharmacological and conservative
NSAIDS- First Line Naproxen
Elevate limb, cold compress, avoid trauma
Second line Colchicine is on warfarin or heart failure or gastric issues or renal
Very severe renal issue use steroids
How to introduce allopurinol?
Allopurinol Use if recurrent attacks, tophi or renal stones Introduce with NSAID or colchicine cover for 3/12
at least 2 weeks after acute attack
Polarized light microscopy shows Positively birefringent rhomboid-shaped crystals?
Pseudo gout
Xray pseudogout may show?
Chondrocalcinosis
Ankylosing spondylitis in who and when?
Males ore common 6 fold, late teens to early 20s 95% HLA B27 +ve
Features of Ankylosing spondylitis?
Radiates from SI joints to hips and buttocks
Worse @ night morning stiffness
Relieved by exercise.
Progressive loss of all spinal movements
Schober’s test <5cm
Some develop thoracic kyphosis and neck hyperextension = question mark posture
Enthesitis: Achilles tendonitis, plantar fasciitis Costochondritis
Extra-articular manifestations of ankylosing spondylitis?
Osteoporosis
Iritis/Uveitis
Fibrosis
Xrays of Ank Spon?
Sacroliliitis: irregularities, sclerosis, erosions
Vertebra: corner erosions, squaring syndesmophytes (bony proliferations)
Bamboo spine: calcification of ligaments, periosteal bone formation
What is shown?
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Bamboo spine
What is shown?
Ank spon- squaring of vertebrae and loss of cancavity
Bloods in ank spon?
FBC (anaemia), ↑ESR, ↑CRP, HLA-B27
Ankylosing spondylitis initial treatment?
NSAIDS with PPI
Coxibs have been used but questions rasied RE cardiac
Ankylosing spondylitis refractory to NSAIDs?
TNF alpha and continued NSAIDs
Features of psoriatic arthritis?
Psoriatic plaques Nail changes Pitting Subungual hyperkeratosis Onchyolysis Enthesitis: Achilles tendonitis, plantar fasciitis Dactylitis
Joint involvement psoriatic arthritis?
Asymmetrical oligoarthritis: 60% (commonest)
Distal arthritis of the DIP joints: 15% (classical)
Pencil in cup sign?
Psoriatic arthritis due to erosion
Psoriatic arthritis treatment?
Similar to RA
Reactive arthritis symptoms and presentation?
Asymmetrical lower limb oligoarthritis: esp. knee
Iritis, conjunctivitis
Keratoderma blenorrhagica: plaques on soles/palms
Circinate balanitis: painless serpiginous penile ulceration
↑ESR, ↑CRP
Cant see cant pee cant climb a tree
Reactive arthritis reaction to what?
Urethritis (chlamydia) or dysentry
Treatment of Reactive arthritis?
NSAIDs steroids, may need dmards if relapse
What is enteropathic arthritis?
Assoc with IBD
Joint affected in enteropathic arthritis?
Asymmetrical large joints affecting lower limbs
What is shirmers test what is it used for?
Quantitatively measures tears. A filter paper is placed in the lower conjunctival sac. The test is positive if less than 5 mm of paper is wetted after 5 minutes.
Antibodies in sjogrens?
Anti ro and anti la
What is CREST syndrome?
Calcinosis
Raynaud’s
Esophageal and gut dysmotility → GOR
Sclerodactyly
Telangiectasia
Best diagnostic antibody SLE?
Most Specific antibody for SLE?
ANA ~ 100% positive
dsDNA
Antibodies in drug induced lupus? Which drugs?
Anti histone
Phenytoin, Isoniazid, hydralazine
Treatment for many aspects of SLE?
Hydroxychloroquine
Sun screen
ACEi for nephro involvement
High dose pred
Weak abduction of arm what nerve?
Axillary
Fracture of humerus what nerve and palsiy?
Radial wrist drop/waiters tip
Elbow dislocation nerve and sign?
Ulnar claw hand
Hip dislocation and fracture of fibular causes what palsy?
Foot drop
Monteggia fracture?
of proximal 3rd of ulna shaft § Anterior dislocation of radial head at capitellum §
May → palsy of deep branch of radial nerve → weak finger extension but no sensory loss
Galleazzi fracture?
of radial shaft between mid and distal 3rds § Dislocation of distal radio-ulna joint
Colles fracture? Usual mechanism?
FOOSH
Extra-articular # of dist. radius (w/i 1.5” of joint)
Dorsal displacement of distal fragment
Dinner fork deformity
Frozen Shoulder: Adhesive Capsulitis presentation?
Progressive ↓ active and passive ROM ↓ ext. rotation <30degrees
↓ abduction <90degree
• Shoulder pain, esp. @ night (can’t lie on affected side)
Treatment of frozen shoulder?
Usually NSAIDS and physio
?steroid injection if bad
Impingement Syndrome / Painful Arc presentation? What is affected?
Entrapment of supraspinatus tendon and subacromial bursa between acromion and grater tuberosity of humerus.
→ subacromial bursitis and/or supraspinatous tendonitis
Painful arc: 60-120º
Weakness and ↓ ROM
+ve Hawkin’s test
Where does a shoulder dislocate usually?
Anteriorly in 95%
Ottawa ankle rules?
Tenderness along distal 6cm of posterior tib / fib including posterior tip of the malleoli.
Inability to bear weight both immediately and in ED
Needs Xray if either
Most common cause of haemarthosis in trauma?
ACL injury
Lateral blow to the knee can give what?
Unhappy Triad
Damage to:
ACL
MCL
Medial Meniscus
Z score for osteoporosis?
Z score of -1 to -2.5 is what?
Ostepoaenia
Most important risk factor for the dveelopment of osteoporosis?
Steroids
Treatment of osteoporosis without assessment in who?
Women previous fragility fracture, and people over 70 taking steroids, but NICE reccomends assessment of people with risks for fragility
Offer a dual-energy X-ray absorptiometry (DXA) scan in?
Over 50 years of age with a history of fragility fracture.
Younger than 40 years of age who have a major risk factor for fragility fracture
What to consider prescribing for >50 taking high dose steroids >7.5mg pred for 3 months
Bisphos- Alendronate or risendronate
Core symptoms of PMR?
Bilateral shoulder and/or pelvic girdle pain. Initially this may be unilateral but quickly becomes bilateral, is worse with movement, and interferes with sleep.
Stiffness lasting for at least 45 minutes after waking or periods of rest that may cause the person to have difficulty turning over in bed
SYSTEMIC- Low-grade fever, fatigue, anorexia, weight loss, and depression
Prednisilone dose for PMR ?
15mg for a week and assess response then continue until resolution then reduce
PMR age and duration?
>50 at least 2 weeks of symptoms
Disorganised mosaic pattern of lamellar bone?
Pagets
Where is affected msot in pagets?
Most to least - spine, skull, pelvis and femur
Pagets blood tests?
Everything normal except ALP
Symptoms of pagets?
Typical asymptomatic or pain localised to bone with lesions, or fracture and or joint problem from bne remodelling
Xray change in pagets?
Sclerotic and lytic bone lesions
What is shown what blood test may be high?
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Left pelvic pagets disease likely ↑raised ALP
Pagets treatment?
Bisphosphonates
Proximal muscle weakness and bone pain?
Osteomalacia
Diagnostic bloods for osteomalacia?
Low Vit D, Low or normal calcium, and elevated PTH
ALP ↑
Drugs that cna cause osteamalacia?
Anticonvulsants
Antibody sensitive for SLE and antibody specific?
ANA sensitive, DsDNA specific and also anti smith
Most common joints affected for osteoarthritis?
Hips, knees and small bones of hand (thumb)
Limited cutaneous sclerosis features?
Calcinosis
Raynauds
Eosopahgeal dysmotility
Sclerodactyly
Telangectasia
What is this what syndrome associated?
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Sclerodactyly- CREST
limited cutaneous sclerosis
Which antibodies for CREST?
Anti centromere
What is subchonral sclerosis?
Thickening of bone (looks more white)
What are osteophytes?
Bone spurs coming off the bones