MSK Flashcards
What are the common presenting complaints in MSK health?
- Pain
- Arthralgia - Joint pain
- Myalgia - Muscle pain
- Pain in soft tissues
- Joint stiffness
- Joint swelling
What are the differentials to be considered if a patient has shoulder pathology (Pain/Stiffness etc)?
- Impingment (Supraspinatus tendonitis)
- Rotator cuff tear
- Adhesive capsulitis
- OA
- Dislocation/Instability
What are the differentials to be considered if a patient has Hip pathology (Pain/Stiffness etc)?
- OA
- Inflammatory arthritis
- Trochanteric bursitis
- # NOF
What are the differentials to be considered if a patient has knee pathology (Pain/Stiffness etc)?
- ACL Tear
- PCL tear
- Meniscal tear
- Collateral ligaments tear
- OA
- Pre-patellar bursitis
- Septic Arthritis
What are the differentials to be considered if a patient has Spine pathology (Pain/Stiffness etc)?
- OA
- Facet joint deterioration
- Ankylosing spondylitis
- Sciatica
- Cauda Equina
- Spinal cord compression
What are the differentials to be considered if a patient has Lower back pathology (Pain/Stiffness etc)?
- MSK pain (Paravertebral muscles)
- Lumbar spondylosis
- Lumbar OA
- Lumbar disc prolapse
- Spinal #
- Discitis
- AS
- Bone lesion/Mets
- PID
- AAA
What are the differentials to be considered if a patient has joint pain/stiffness/swelling?
- RA
- Gout
- Psoriatic arthritis
- OA
- Septic arthritis
- Trauma
What MSK conditions are common in children?
- Transient synovitis - Knee/Hip/Any joint
- Perthes/SUFE/DDH - Hip
- Osgood-Schlatters/Patellar tendonitis - Knee
You are asked to assess an acutely unwell patient with any pathology, how would you approach this assesment?
[Airway]
- Any signs of airway obstruction, foreign bodyFacial/mandibular/laryngeal fracture
- Protect C spine
- If patient talking -> airway likely fine
- Nasopharyngeal airway -> Conscious patient
- Oropharyngeal airway -> Unconscious patient GCS <8
- Give High flow O2 at high rate - 15L Rebreather
[Breathing]
- Evaluate breathing
- Look/listen/feel for signs of respiratory distress
- Count RR in breaths/min
- Assess rhythm/depth of breaths
- Assess position of trachea
- Equal chest expansion on observation & palpation
- Note chest deformity
- Record SpO2
- Percuss & Auscultate chest
[Circulation]
- Assess cardiac status & control haemorrhage if present
- Assess blood loss
- Pallor & temperature (peripheral circulation)
- Pulse & CRT <2s
- Level of consciousness
- BP
- If bleeding
- 2 large bore cannula
- Crossmatch blood & Baseline bloods - FBC/U&E
- IV fluid - Ringers Lactate
- Apply pressure to stem bleeding
- Note: If patient not responding to fluid resus - consider internal bleeding (Abdomen/pelvis)
- Auscultate the heart
- HS present? Any extra?
- Valve areas
- Urinary catheter to assess fluid loss
[Disability]
- GCS score/AVPU
- Pupils - PEARL
- Assess for spinal cord injury
- blood glucose
[Exposure]
- Fully expose the patient to examine for signs of trauma
- Ensure to prevent hypothermia
Secondary survey
- Head to toe exam
- Hx taking - SAMPLES
- S - signs & symptoms
- A - Allergies
- M - Medications
- P - Past medical Hx
- L - Last meal & drink
- E - Events leading up to present illness/injury
- S - Social Hx
A patient presents with joint swelling and pain, you aspirate the synovial fluid and find the following results. What do they suggest?
- Colour -> Colourless
- Clarity - Transparent/translucent
- Viscosity -> Normal
- WBC -> <200 cells/mm3
- Neutrophils -> <25% of total WCC
- Gram stain -> Negative
- Crystals -> Negative
Normal
A patient presents with joint swelling and pain, you aspirate the synovial fluid and find the following results. What do they suggest?
- Colour ->Yellow/Green
- Clarity -> Cloudy/Opaque
- Viscosity -> Decreased
- WBC -> >50,000/mm3
- Neutrophils -> 75%
- Gram stain -> Positive
- Crystals -> Negative
Septic Arthritis
A patient presents with joint swelling and pain, you aspirate the synovial fluid and find the following results. What do they suggest?
- Colour ->Straw like/yellow
- Clarity -> Translucent
- Viscosity -> Increase
- WBC -> <2000/mm3
- Neutrophils -> <25%
- Gram stain -> Negative
- Crystals -> Negative
Non-inflammatory pathology
A patient presents with joint swelling and pain, you aspirate the synovial fluid and find the following results. What do they suggest?
- Colour ->Yellow
- Clarity -> Cloudy
- Viscosity -> Decreased
- WBC -> 2000-50,000/mm3
- Neutrophils -> 50%
- Gram stain -> Negative
- Crystals -> Positive or Negative
Inflammatory Pathology
- Positive crystals = Gout
- Negative crystals = Pseudogout
A patient presents with joint swelling and pain, you aspirate the synovial fluid and find the following results. What do they suggest?
- Colour ->Red/xanthochromic
- Clarity -> Bloody
- Viscosity -> Variable (Increased/Decreased)
- WBC -> 200-20,000/mm3
- Neutrophils -> 50-75%
- Gram stain -> Negative
- Crystals -> Negative
Haemarthrosis
You are given a patients x-ray result to interpret. How would you do this?
[Patient details]
- Patient ID - Name & DOB & Date of x-ray
- Image orientation
- Adequacy - Correct projection/Area of interest included
- Should be more than one view - AP/Lateral/Frog leg (Hip)
- Joint above & Joint below should be shown
- Due to the potential for additional injuries - Fracture/dislocation
- Is bone and soft tissue easily seen & differentiated
- Assess if the patient is rotated
[Assess image]
- Alignment
- Bones
- Cortex - Should be smooth, continuous line
- Density
- Trabecular pattern - Disruptions Lucent/Sclerotic lines
- Lucent (Black) lines -> Displaced fracture
- Sclerotic (White) lines -> Overlapping fracture
- Is patient skeletally mature (Fused epiphyses/growth plates)
- Cartilage & Joints Assess for degeneration - LOSS
- Loss of joint space
- Osteophytes
- Subchondral cysts
- Sclerosis (Subchondral)
- Inflammatory changes
- Periarticular osteoporosis
- Soft tissue swelling
- Bony erosions
- Soft tissue
- Artefacts
[Describe fracture]
- Site of fracture
- Which bone
- Which part of the bone
- Proximal/Middle/Distal 1/3 OR Intra-articular
- Examine entire cortex for any breaks
- Type of fracture
- Simple (Skin intact)/Open (Skin not intact)
- Transverse (Perpendicular to long axis of bone)
- Oblique (Angled <90 deg to long axis of bone)
- Spiral (Curving around bone)
- Greenstick (Break in one cortex, other cortex remains intact)
- Vertical (Parallel to long axis of bone)
- Is it single or comminuted (>2 fragments of bone)
- Is it displaced or not?If displaced, in what direction? (relationship of distal fragment to the proximal fragment)
- Non-displaced
- Anterior/Posterior/medial/lateral displacement
- Impacted (Bone fragments driven into each other)
- Is it angulated?
- Movement of distal fragment relative to proximal bones in deg
- Is the bone of normal consistency or not?
- Osteopenia -> Most of bone is dark (Radiolucent) and cortex is thin
- Radiolucency around joint -> Inflammation/infected joint
- Focal lucent areas -> Bone lesion
- Sclerotic (Radio-opaque) -> Sclerotic bone metastases
- Is there any shortening of the bone?
[Present exam]
- Wash hands & Thank patient
- “This is patient x who is a x year old Male/Female with the following findings”
- I would take a full Hx from the patient & Examine the joint
- Consider differentials
- Investigations
- Observations
- Bloods
- Imaging
- Management
What are the different types of #?
- Simple (Skin intact)/Open (Skin not intact)
- Transverse (Perpendicular to long axis of bone)
- Oblique (Angled <90 deg to long axis of bone)
- Spiral (Curving around bone)
- Greenstick (Break in one cortex, other cortex remains intact)
- Vertical (Parallel to long axis of bone)
What is the difference between Subluxation and Dislocation?
Subluxation -> Normal anatomy of the join is disrupted - remains contact between articular surfaces of the joint
Dislocation -> Complete disruption of the joint with no contact b/w joint surfaces
What would be the findings on x-ray in a joint with OA?
LOSS
- Loss of joint space
- Osteophytes
- Subchondral sclerosis
- Subchondral cysts
What would be the findings on x-ray in a joint with RA or any other inflammatory arthritis?
LESP
- Loss of joint space
- Erosions of bone
- Soft tissue swelling
- Periarticular Osteoporosis
What would be the findings on x-ray in a patient with Gout?
- Overhanging edges
- Usually 1st MTP joint
- Erosions
What is meant by the following terms:
Varus
Valgus
Varus – Distal part to the joint described points TOWARDS the midline
Valgus
What is the growth plate/Physis?
What is the biggest worry with a growth plate injury in children?
Physis = Area of cartilage which proliferates and the leading edge calcifies to form new bone
Can lead to cessation of growth & limb shortening
What is the structure of bone?
- Epiphysis (Superior)
- Physis (Growth plate)
- Metaphysis
- Diaphysis (Shaft)
What is SUFE?
- Slipped upper femoral epiphyses - Caused by instability of the proximal femoral physis which then allows the cap of the femoral head epiphysis to slip
- Usually a-traumatic or due to minor injury
What causes SUFE?
Weakness in the growth plate caused by:
- Stress on the growth plate due to obesity
- Endocrine disorders - Pan-hypopituitarism/Hypothyroidism/Renal Osteodystrophy
- Period of rapid grwoth in adolescence
How is SUFE classified?
- Stable - Patient can walk & Osteonecrosis is rare (Most common)
- Unstable - Pt unable to walk + 50% risk of osteonecrosis
What is the epidemiology of SUFE?
- Most commonly affects the hip
- Common in teenage boys & girls
- Risk factors - Obesity/Local trauma/Endocrine dysfunction
What is the classic presentation of SUFE?
- Pain/discomfort in Hip/Referred pain to knee
- Accentuated by activity
- If acute - <3wks of onset
- If acute on chronic - Months of pain with sudden pain
- Reduced hip movement - Internal rotation + Abduction due to pain
- Leg length discrepancy
- Trendelenberg gait
A patient presents with the following Hx, what are your differentials?
A 13-year-old boy presents with hip, groin, thigh, and medial knee pain. He is overweight and recently experienced an adolescent growth spurt. On physical examination, the affected leg is externally rotated and there is limited range of motion in the hip joint. He is unable to bear weight on the affected leg.
- SUFE
- Hip #
- Perthes disease
- Osteomyelitis
- Septic arthritis
- Acute transient synovitis
You suspect the following patient has SUFE, what investigations do you order?
A 13-year-old boy presents with hip, groin, thigh, and medial knee pain. He is overweight and recently experienced an adolescent growth spurt. On physical examination, the affected leg is externally rotated and there is limited range of motion in the hip joint. He is unable to bear weight on the affected leg.
- AP + Frog leg x-ray of Hip
- Widening of epiphyseal line/Displacement of femoral head
- Normal klein line
- U&E - Normal. May have increased Cr if Renal Osteodystrophy
- TFTs - Normal. May have Increased TSH if Hypothyroidism
How is SUFE managed?
- Limit mobility - No movement or rotation of leg
- Analgesia - Paracetamol/Ibuprofen
- If unstable
- Open reduction + Internal fixation w/screws
What are the complications of SUFE?
- Chondrolysis - Degeneration of artciular cartilage
- AVN of epiphysis
What is classified as a Hip #?
Any # distal to the femoral head + Proximal to 5cm below lesser trochanter
Usually caused by falls from standing height in elderly pts, or high energy trauma in younger pts.
What are:
Osteopenia
Osteoporosis
Osteopenia – Decreased BMD due to increased osteoclast activity, and decreased osteoblast activity
- BMD T score of -1 to -2.5
Osteoporosis – Decreased BMD, and deterioration of bone due to increased osteoclast activity, and decreased osteoblast activity
- BMD T score of <-2.5
How are hip fractures classified?
Intracapsular – Within the hip capsule (Femoral neck to femoral head)
- Can disrupt the blood supply to the femoral head leading to AVN
Extracapsular – After the line b/w the greater and lesser trochanter (Trochanteric or Subtrochanteric)
- Less likely to disrupt femoral head blood supply
What causes Hip #?
- Increasing age >65yrs
- Osteoporosis
- Osteomalacia
- Trauma
- Post menopausal female
- Falls
What is Osteomalacia?
Softening of bone due to decreased vitamin D
How are intercapusular hip # classified?
Garden classification
- Garden 1 – Undisplaced + Incomplete
- Garden 2 – Undisplaced + Complete (# from superior - inferior cortex)
- Garden 3 – Slightly Displaced + Complete (# from superior - inferior cortex)
- Garden 4 – Completely displaced + Complete (# from superior - inferior cortex)
What are the classic symptoms/signs of a hip #?
- Pain in upper thigh or groin, may radiate to the knee
- Inability to weight bear
- Hx of previous injury/trauma
- If pathological # - Hx of previous aching pain
- Increased pain on flexion/rotation of leg
- Shortened/Adducted/Externally rotated leg
A patient presents with the following Hx, what is the most likely diagnosis and what are the differentials?
A 72-year-old woman presents with a history of a fall from standing height and an inability to bear weight afterwards. She complains of pain in her right hip. There were no preceding syncopal episodes and no loss of consciousness or chest pain. Physical examination reveals a woman looking her stated age in some distress; cardiac and pulmonary examinatory is non-contributory. Her right hip is painful and sore to palpation with some ecchymoses over the greater trochanter. There are no breaks in the skin, and the right leg is shortened and externally rotated. The pelvis is stable clinically, and there is no pain along the spine and no deformity along the femoral shaft, knee, or tibia. The distal neurovascular status is intact.
- Hip #
- Acetabular #
- Septic arthritis
- Pubic rami #
You suspect a patient has suffered a fractured hip, what investigations should be carried out?
- ABCDE assesment
- AP + Lateral x-ray of Hip
- Disruption of trabeculae, inferior±superior cortex #
- Shentons line broken
- If no # on x-ray but still suspecting a fracture - MRI/CT
- FBC
- Crossmatch blood
- U&E
- Glucose
- ECG
How would you manage a Hip #?
Classify the # - Intracapsular v Extracapsular
- Intracapsular:
- Determine garden classification
- Surgery within 24hrs of admission
-
Garden 1 + 2 – Internal fixation w/screws
- If unfit – Arthroplasty
- Garden 3 + 4 – Replacement of femoral head w/Hemi-arthroplasty or Total hip replacement (If co-morbidities)
-
Garden 1 + 2 – Internal fixation w/screws
- Extracapsular:
- Surgical fixation unless C/I
- Internal fixation - DHSS/Hip arthroplasty
What are the complications of Hip #?
- High mortality rate
- Infection
- Haemorrhage
- AVN
- Delayed union/Malunion
- MI/PE/DVT
What is the blood supply to the proximal femur?
- Medial femoral circumflex artery
- Lateral femoral circumflex artery
- Ligamentum teres artery
What is Spondylolisthesis?
Spondylolisthesis – Movement of one vertebrae relative to others in Ant./Post. due to instability
Stress # and sliding of vertebrae
What is Sponylolysis?
-
Spondylolysis – Bony defect (Stress #) in pars interarticularis of vertebral arch
- Can be unilateral/bilateral
- Commonly affects L5 – causing back pain
What is Spondylosis?
-
Spondylosis – Degenerative OA changes in the spine
- Due to degeneration of IV discs, leading to narrow IV space
- Osteophyte formation may lead to pressure on nerve roots – Motor and sensory disturbance
What is Spondylitis?
Inflammation of the vertebrae
What are the causes/risk factors for spondylolisthesis?
- Female gender
- Young age
- Presence of spina bifida
- Positive FHx
- High impact sport
What symptoms/signs do people with degenerative spondylolisthesis present with?
- Aching pain with insidious onset
- Low back pain & posterior thighs
- Neurogenic claudication (Due to spinal stenosis)
- Pain made worse by walking
- Pain relieved by sitting in forward flexion/lying down
- Chronic & progressive symptoms
What are the symptoms/signs of spondylolysis?
- Asymptomatic
- May be symptomatic:
- Low back pain - provoked by lumbar extension
- Paraspinal spasm
- Tight hamstrings
You suspect a patient may have spondylolithesis, what investigations should be done?
- FBC – Normal. Assess for infection/myeloma
- Ca+ levels – Normal. Assess for hyper/hypocalcaemia
- x-ray – Lateral + AP
- MRI
How is Spondylolisthesis managed?
Pain relief – Paracetamol/NSAIDs/Codeine
If stable:
- Bed rest for 2-3 days
- Sleep on side w/pillow b/w knees
- Activity modification to prevent further injury
- Physiotherapy
If unstable:
- Surgery – Fuse affected vertebrae + Discectomy
What is Spinal cord compression?
- Neurosurgical emergency
- Spinal cord is compressed due to trauma/tumour/prolapsed IV disc/Infection
- Most common cause is malignancy
What are the common malignancies that can cause Spinal cord compression?
- Breast
- Prostate
- Lung
- Bone tumour
What are the red flags which may indicate spinal cord compression?
- T or C spine pain
- Severe unremitting or progressive spine pain
- Spinal pain aggravated by straining – Coughing/Sneezing/Passing stool
- Nocturnal spinal pain preventing sleep
- Localised spinal tenderness
- Limb weakness
- Loss of sexual/Bladder/bowel function
A patient presents with the following Hx, what is the most likely diagnosis? What are the differential diagnoses?
A 25-year-old man presents to the emergency department after an automobile accident. He was ejected from the vehicle. He complains of numbness in both lower extremities and cannot move his legs. There is no pinprick sensation below the umbilicus except for an anal wink, and there is no rectal tone. The bulbocavernosus reflex is weakly present. Power in the lower extremities is graded at 1/5.
- Spinal cord compression
- Transverse myelitis
- GBS
- MS
- Diabetic neuropathy
A patient presents with the following Hx, what is the most likely diagnosis? What are the differential diagnoses?
A 40-year-old woman presents with back pain and difficulty with her gait. She has a long history of smoking and has had some haemoptysis recently. Her examination reveals diminished pinprick sensation from the nipple line caudally, power in the lower extremities of 4/5, absent joint position sense in the lower extremities, and diminished vibratory sense. Anal sphincter tone is intact.
- Spinal cord compression
- Transverse myelitis
- GBS
- MS
- Diabetic neuropathy
A patient presents with the following Hx suggestive of spinal cord compression. How should this be investigated?
A 40-year-old woman presents with back pain and difficulty with her gait. She has a long history of smoking and has had some haemoptysis recently. Her examination reveals diminished pinprick sensation from the nipple line caudally, power in the lower extremities of 4/5, absent joint position sense in the lower extremities, and diminished vibratory sense. Anal sphincter tone is intact.
- FBC – Check for infection
- U&E
- MRI Whole spine – Assess for level of compression
- Within 24hrs
A patient presents with symptoms suggestive of spinal cord compression, how is this managed?
- Nurse patient lying flat in neutral alignment
- Dexamethasone IV
- Insert catheter to manage bladder dysfunction
- Pain control
- Analgesia
- Palliative radiotherapy - if malignant cause
- May require spinal orthoses/vertebroplasty/kyphoplasty
A patient presents with the following Hx, what is the most likely diagnosis? What are the differentials?
A 38-year-old man with no significant history of back pain developed acute lower back pain when lifting boxes 2 weeks ago. The pain is aching in nature, located in the left lumbar area, and associated with spasms. He describes previous similar episodes several years ago, which resolved without seeing a doctor. He denies any leg pain or weakness. He also denies fevers, chills, weight loss, and recent infections. Over-the-counter ibuprofen has helped somewhat, but he has taken it only twice a day for the past 3 days because he does not want to become dependent on painkillers. On examination, there is decreased lumbar flexion and extension secondary to pain, but a neurological examination is unremarkable.
- MSK Back pain
- IV disc prolapse
- Vertebral #
- CES
- Spinal metastases
- Osteomyelitis
A patient presents with the following Hx, what is the most likely diagnosis? What are the differentials?
A 48-year-old insurance salesman presents with a 25-year history of back pain. He developed severe back pain while stacking shelves at the local supermarket at age 23. The pain resolved after 10 days of bed-rest, followed by 3 months of physiotherapy. He has had multiple episodes of back pain occurring at increasing regularity over the years and, in the past 10 years, has changed his occupation to salesperson. Currently, he has back pain measuring 8 out of 10 on a visual analogue scale and bilateral leg pain. The back pain is exacerbated by flexion, and the leg pain is reproduced by a straight leg raise of 70 degrees. He has numbness of both feet in the L5 dermatome; motor and reflexes are normal.
- IV disc prolapse
- MSK Back pain
- Vertebral #
- CES
- Spinal metastases
- Osteomyelitis
A patient presents with the following Hx, what is the most likely diagnosis? What are the differentials?
A 68-year-old man presents with increasing back pain. The pain started when he was in his 30s and has progressed over time. He now also reports heaviness in both his legs when he walks 2 blocks. He retired from his job as a teacher 3 years ago, and now spends a large proportion of his time gardening. He can sit for a only few minutes, and then has great difficulty in getting up. He has no other medical conditions. On examination, his spinal range of motion is very disturbed. He stands with a forward stoop. He can stand on his toes and heels and has a normal neurological examination. A straight leg raise causes no pain or restriction.
- IV disc prolapse
- MSK Back pain
- Vertebral #
- CES
- Spinal metastases
- Osteomyelitis
A patient presents with back pain, what are the red flags that need to be ruled out?
Cauda Equina Syndrome:
- Saddle anaesthesia/parasthesia
- Recent onset of bladder dysfunction/faecal incontinence
- Perineal/perianal sensory loss
- Severe/progressive neurological deficit in LL
Spinal #
- Sudden onset of severe central pain in spine, relieved by lying down
- Major trauma - RTA/Fall from height
- Minor trauma - strenuous lifting if patient has osteoporosis
- Structural deformity of spine
- Point tenderness over vertebral body
Cancer
- Pain that remains on lying down
- Aching night time pain that disturbs sleep
- Thoracic pain - consider thoracic aortic aneurysm
- Hx of cancer
- Unexplained weight loss
Infection (Discitis/osteomyelitis)
- Fever/Chills
- Unexplained weight loss
- Recent infection - UTI
- IVDU
- Immune suppression
- Point tenderness over vertebral body
What are the Waddell signs?
Signs which suggest that the patient is exaggerating their level of pain etc.
- Superficial tenderness
- Stimulation manoeuvres that are painful - e.g. axial loading of head/passively rotating shoulders/pelvis
- No pain on distraction
- Overreaction - disproportionate response to examination
A patient presents with the following Hx, suggestive of back pain. What investigations would you order?
How would you manage this patient?
If simple back pain - No investigations
- Spine exam
- Neurological exam
If serious pathology likely e.g. red flags present
- X-ray -> Considering # or cancer
- CT scan -> Considering stress #/spondylolisthesis
- FBC -> Rule out cancer/infection/inflammation
- ESR -> Rule out cancer/infection/inflammation
- CRP -> Rule out cancer/infection/inflammation
- Urinalysis -> Rule out infection
- LFTs – ALP raised if metastatic disease/pagets disease of bone
[Management]
Conservative
- Keep patient active
- Give analgesia to facilitate increased activity if required
- Paracetamol
- NSAIDs - Ibuprofen/Naproxen
- Codeine/Tramadol
- If rest is suggested - only 48hrs
- Physiotherapy
Medical
- Consider epidural corticosteroid injections - reduce nerve pain
- If acute spasm -> Diazepam
- TENS machine
- Trancutaneous Electrical Nerve Stimulation
- Lumbar discectomy - if severe nerve compression or persistent symptoms despite conservative management
What is Cauda Equina syndrome?
Where the cauda equina (Below L1) - nerve roots are compressed.
Medical EMERGENCY
Caused by:
- Herniation of Lumbar IV disc - most commonly L4/5 or L5/S1
- Tumours - Metastases/lymphoma/spinal tumour
- Trauma
- Infection
- Congenital - Congenital spinal stenosis/kyphoscoliosis/spina bifida
- Spondylolisthesis
- AS
Who Classically gets Cauda Equina?
What are the symptoms/signs?
- Not very common
Symptoms/Signs:
- Low back pain ± pain in unilateral/bilateral LL
- Sudden onset of + Rapidly progressing:
- Bladder ± bowel dysfunction
- Urinary retention
- Decreased bladder/urethral sensation
- Faecal incontinence/Constipation
- Reduced sensation in the saddle (Perineal) area
- Sexual dysfunction
- LMN Neurological signs