What is osteochondritis dissecans
Joint condition where piece of bone underneath cartilage dies due to lack of blood supply. Often knees but can be elbow ankle or other joints. Associated with repeated minor trauma. Pain after activity.
UMN features
Increased tone (spasticity, reduced power, spastic paresis, little or no muscle wasting, hyperreflexia with clonus, up going babinski
LMN features
Reduced tone, reduced power flaccid paralysis, muscle wasting, may have fasciculations. Reduced or absent deep tendon reflexes. Downgoing babinski
Common cancers to cause bony mets
breast lung prostate renal and gastric
How does back pain present when caused by a cancer?
Unremitting, worse at night or lying down, worse on straining, midline tenderness over spine, weight loss, age more than 50YO.
What might back pain be like if due to infection (discitis, osteomyelitis, abscess)
fever. risk factors such as diabetes, IV drug use, TB HIV recent UTI.
What might back pain due to a fracture present with?
History of trauma, may be major or minor especially if known OP. Pain is sudden onset, midline pain eased when lying down. Rarely may feel step deformity in spine. Point tenderness over bone usually.
What might bilateral sciatica be?
Bilateral sciatica may suggest cauda equina. If sudden onset bilateral radicular pain or unilateral sciatica which progresses to bilateral (even without CES symptoms).
Causes of spinal cord compression
Cancer, trauma, degenerative spondylosis with myelopathy, central disc herniation, infection (spinal epidural abscess, or spinal TB).
Cancer is most common cause in the UK
Pattern of disc herniations
Cervical disc herniate centrally, lumbar discs herniate laterally. Central disc herniations are rare but if they occur they can compress the cord or cauda equina, serious. By comparison a lateral disc herniation may cause radicular pain in arm or leg but little other neurology.
Signs and symptoms of spinal cord compression
Bladder or bowel dysfunction, gait disturbance (or heavy legs), limb weakness, UMN features, numbness paraesthesia or sensory loss, radicular pain.
Will have LMN pattern at the level of the lesion and UMN pattern below the level of the lesion.
May have history of cancer.
Mx of SCC
should be a local pathway
give 16mg oral dexamethasone
immobilise patient if signs/symptoms of instability.
pain assessment
aim for MRI within 24hrs.
Mx of suspected spinal mets
ensure no signs/symptoms of SCC
discuss with cancer team
consider immobilisation if mod severe pain on movement
pain assessment and give pain relief.
MRI within 1 week or CT if CI.
Consider steroids (this is likely secondary care decision).
Further mx may include RT, or surgical stabilisation.
What is the most common cause of cauda equina
Central disc prolapse at L4/5 or L5/S1.
But can also be due to cancer, trauma, or infection (all the same causes as SCC just at a different place)
Early signs of cauda equina
Altered saddle sensation, altered sense of micturition, delay or difficulty opening bowels or initiating micturition, change in erections or vaginal sensation, back pain with or without sciatic pain, bilateral sciatica may be present but may not be
Later signs of cauda equina
Saddle anaesthesia, overflow incontinence, severe progressive bilateral neurological deficit in the lower limbs, LMN signs, loss of anal tone.
Investigation of choice in cauda equina
MRI (or CT if MRI CI).
No role for any drug treatments for cauda equina.
Referral for suspected cauda equina (CES)
New or deteriorating CES symptoms <2 weeks or severe or progressive neurological deficit in both legs - A&E
Stable CES symptoms >2 weeks or bilateral sciatica without CES symptoms - urgent referal to MSK services within 2 weeks.
If in doubt, speak to senior A&E clinician or on call radiologist.
Common tendinopathies
Tennis elbow - extensor origin tendinopathy, lateral
Golfers elbow - flexor origin tendinopathy
Patellar tendinopathy - anterior knee pain
Achilles tendinopathy - posterior ankle pain.
Presentation of greater trochanteric pain syndrome
Lateral hip pain that is exacerbated by prolonged sitting, climbing stairs, high impact physical activity, or lying on the affected side.
The cause is a trochanteric bursitis associated with tendinopathy of gluteus medius or minimus
Presents with lateral hip pain and focal point tenderness over greater trochanter.
What causes tendinopathies
multifactorial, age, genetic predisposition, metabolic factors, structural factors (eg of foot or knee), overuse, or trauma. Extrinsic factors can play role, for example, equipment, technique of exercising, drugs such as ciprofloxicin.
Overuse is the big trigger!
Always ask about sports history and occupation history. Crucially what has changed.
Presentation of a tendinopathy
Localised tendon pain during activity.
Pain rarely occurs at rest or with low load.
tenderness to palpate the tendon
tendon swelling
impaired function (weakness)
pain often eases during an activity but worsens afterwards.
Pain from tendinopathy tends to increase over weeks to months rather than starting suddenly. They are difficult to treat and may take months to resolve.
When you have a tendinopathy that puts you at risk of tendon rupture.
Achilles tendon rupture
Simmonds triad - calf squeeze fails to move the foot, palpable gap, altered angle of dangle.
May have sudden pop. Often cannot walk but some can!
Fluoroquinolone antibiotics and corticosteroids increase risk of tendon rupture.
Mx by same day referal to orthopedics.
Management of tendinopathies
NSAIDs - can be used short term for pain but not long term. Tendinopathies are degenerative rather than inflammatory so NSAIDs do not help with healing.
Eccentric exercises
Counterforce brace for tennis elbow
Explanation, education, relative rest and activity modification.
Steroid injections have little benefit and are CI for lower limb tendinopathies due to risk of tendon rupture.
No evidence of any benefit of surgery with tendinopathies.