Musculoskeletal Flashcards
What is ankylosing spondylitis?
Ankylosing spondylitis (AS) is a chronic progressive inflammatory arthropathy. Patients present with severe pain and spinal stiffness, which ultimately may lead to spinal fusion
What are the signs and symptoms of ankylosing spondylitis?
> Inflammatory back pain > Iritis/ uveitis > Enthesitis > Fatigue > Sleep disturbance > tenderness at sacroiliac > Dyspnoea > Loss of lumbar lordosis > Peripheral joint involvement> Kyphosis
What are the risk factors of ankylosing spondylitis?
HLA-B27ERAP1 and IL23RFHx
What is the epidemiology of ankylosing spondylitis?
The prevalence of AS correlates with that of HLA-B27 within a population. The mean AS prevalence per 10,000 people (from 36 eligible studies) has been estimated as 23.8 in Europe, 16.7 in Asia, 31.9 in North America, and 10.2 in Latin America.
What investigations would you do for ankylosing spondylitis?
Pelvic X Ray (sacroiliitis)
What is gout?
Gout is a syndrome characterised by: hyperuricaemia and deposition of urate crystals causing attacks of acute inflammatory arthritis; tophi around the joints and possible joint destruction; renal glomerular, tubular and interstitial disease; and uric acid urolithiasis.
What is pseudogout?
Calcium pyrophosphate deposition (CPPD) is associated with both acute and chronic arthritis. Acute CPP crystal arthritis is an acute inflammatory arthritis of one or more joints.Happens to older people
What are the risk factors of gout?
older agemale sexmenopausal statusconsumption of meat, seafood, alcoholuse of diureticsuse of ciclosporin (cyclosporine) or tacrolimususe of pyrazinamideuse of aspiringenetic susceptibilityhigh cell turnover state
What are the risk factors of pseudogout?
> Age > Injury > Hyperparathyroidism > Haemochromatosis > FHx > Hypomagnesaemia > Hypophosphatasia
What is the epidemiology of gout?
The prevalence in the western world is about 1%, with a male to female ratio of 7:1 to 9:1; in the UK
What is the epidemiology of pseudogout?
In the UK, the prevalence of cartilage calcification associated with knee pain was 4.5%, with a strong age association.
What are the signs and symptoms of gout and pseudogout?
> rapid onset severe pain> Joint stiffness> Foot joint distribution> Few joints affected> Swelling and joint effusion> Tenderness> Tophi> Erythema/ warmPseudo: Painful joints, osteoarthritis joints involved, suddenly worse osteo
What are the investigations you would do for pseudogout?
> Athrocentesis with synovial fluid analysis (positively birefringent rhomboid-shaped crystals under polarised light)
X Rays affected joint (linear, stippled radio-opaque deposits in the cartilage)
Bloods- calcium, PTH, iron [Normal or elev.], magnesium, alk phos [Normal or decreased]
What are the investigations you would do for gout?
> Arthrocentesis with analysis- High WCC and negative birefringent needle shaped crystals
What is fibromyalgia?
Fibromyalgia is a chronic pain syndrome diagnosed by the presence of widespread body pain (front and back, right and left, both sides of the diaphragm) for at least 3 months in addition to tenderness (digital palpation at an approximate force of 4 kg) of at least 11 out of 18 designated tender point sites as defined by the American College of Rheumatology 1990 classification criteria.
What are the risk factors of fibromyalgia?
> Fhx fibromyalgia> Rheumatology > Age between 20-60> Female
What are the signs and symptoms of fibromyalgia?
> Chronic pain > Diffuse tenderness on examination > Fatigue unrelieved by rest > Sleep disturbance > Mood disturbance > Cognitive dysfunction > Headaches > Numbness > Stiffness > Fluid Retention
What is the epidemiology of fibromyalgia?
Fibromyalgia is a common condition worldwide in all ethnic and socio-economic groups. Studies show the prevalence in the general population to be between 0.5% and 5%.
What investigations would you do for fibromyalgia?
> Clinical diagnosis first line
What is Giant Cell Arteritis?
Giant cell arteritis (GCA) is a granulomatous vasculitis of large and medium-sized arteries. It primarily affects branches of the external carotid artery, and it is the most common form of systemic vasculitis in adults.
What are the risk factors of giant cell arteritis?
> Age > 50
> Female
What is the epidemiology of giant cell arteritis?
In Olmsted County, Minnesota, the average annual incidence is about 19 cases per 100,000 people 50 years of age or older. This is similar to that reported in northern European populations.
What are the signs and symptoms of GCA?
HeadachePolymyalgia rheumatic symptomsExtreity claudicationCranial artery abnormalitiesSystemic symptoms
What are the investigations of GCA?
Bloods> ESR (raised)> CRP (raised)> FBC (anaemia, WCC high, transaminases and alk phos mildly elevated)Temporal artery biopsy- granulomatous inflammationTemporal artery US- halo sign
What are the complications of GCA?
> Large vessel stenoses
Aortic aneurysms
Glucocorticoid related adverse effects
Vision loss
What is the management of GCA?
> Prednisolone> Aspirin (adjunct)+ methotrexate
What is the prognosis of GCA?
The majority of patients respond rapidly to initial treatment with glucocorticoids, and vision loss in treated patients is rare. Lack of response to therapy should alert the physician to question the diagnosis; however, up to 50% of adequately treated patients experience unpredictable disease relapses and recurrence of symptoms.
What are idiopathic inflammatory myopathies?
Idiopathic inflammatory myopathies constitute a heterogeneous group of sub-acute, chronic, and, rarely, acute diseases of skeletal muscle that have in common the presence of moderate-to-severe proximal muscle weakness and inflammation on muscle biopsy.