Rheumatology/ MSK Flashcards
RHEUMATOID ARTHRITIS
What is it?
- chronic systemic inflammatory disease with a symmetrical, deforming and peripheral polyarthritis
RHEUMATOID ARTHRITIS
Epidemiology between males and females pre and post menopausal?
PRE- F:M 3:1
POST- 1:1
RHEUMATOID ARTHRITIS
Aetiology?
Genetics- HLA-DR4 and HLA-DR1
Presence of rheumatoid factor- autoantibodies against Fc portion of IgG
RHEUMATOID ARTHRITIS
Pathology?
1) Lymphocytes and macrophages produce IL-1 and TNFalpha, releasing metalloproteinases that destroy cartilage
2) Proliferation and growing of synovium over the articular cartilage (known as pannus), destroys articular cartilage and subchondral bone producing bony erosions
RHEUMATOID ARTHRITIS
Features of Inflammatory?
1) Pain eases with use
2) Significant stiffness >60 min
3) Synovial +- bony soft swelling
4) Hot and red
5) Younger patients with possible family history
6) Hands and feet
7) Responds to NSAID’s
OSTEOARTHRITIS
Features of Degenerative?
1) Pain increases with use
2) <30 mins of stiffness; not prolonged
3) no swelling (maybe hard swelling)
4) Not inflamed
5) Older people, prior occupation/sport
6) Common in CMCJ, DIPJ and knees
7) Less response to NSAID’s
RHEUMATOID ARTHRITIS
Signs?
What are the late deformities?
- symmetrical painful and stiff small joints (MCP, PIP, MTP, wrist)
Nodules and neuropathy
Early= inflammation but no joint damage
Later= Deformities:
1) Ulnar deviation of fingers
2) Boutonnieres
3) z thumb (swan neck)
4) Swan neck
RHEUMATOID ARTHRITIS
Diagnosis?
bloods- Anaemia, rheumatoid factor +ve (70%), anti- CCP positive (90%), increased CRP, ESR, platelets
X-Rays 1) loss of joint space 2) Soft tissue swelling
3) Osteopenia next to cartilage 4) Joint deformity
RHEUMATOID ARTHRITIS
Treatment? (1st line, 2nd line and symptom and flare up relief)
1st - DMARDs (methotrexate, hydroxychloroquine)
2nd- biological agents alongside 1st line (infliximab, rituximab)
NSAIDs = symptom relief
Steroids (IM,IV) treat bad flare ups
OSTEOARTHRITIS
Risk factors and M:F RATIO?
1) Obesity
2) Age
3) Joint trauma
4) Active occupation
F:M 3:1
OSTEOARTHRITIS
What is the difference between primary and secondary
primary OA is generalised. Secondary is in joints that have already been damaged
OSTEOARTHRITIS
Signs?
1) Pain on movement and relieved by rest
2) Stiffness <30 mins
3) Crepitus present
4) bony swelling
5) 1st MCPJ and knees
6) Decreased RoM
OSTEOARTHRITIS
Diagnosis?
1) negative rheumatoid factor
2) X-Ray = LOSS
Loss of joint space
Osteophytes
Subchondral cysts
Subarticular sclerosis
OSTEOARTHRITIS
Treatment?
1) Physical management (padded shoes, stick, weight loss, brace)
1st- Paracetamol + topical NSAID
2nd- weak opioid and PO NSAID/PPI
OSTEOARTHRITIS
Treatment to relieve severe pain?
intra-articular steroids
OSTEOARTHRITIS
What if a patient works at night and has significant limitations of function?
consider surgery
OSTEOPOROSIS
What is the definition?
A bone density of >2.5 standard deviations below young adult mean
What is Osteopenia?
A bone density of between -1 and -2.5 standard deviations below young adult mean
OSTEOPOROSIS
Causes?
1) Increased bone loss
2) Inadequate peak adult bone mass
3) Women lose trabeculae with age
OSTEOPOROSIS
rISK FACTORS?
Steroids Hyperthyroidism Alcohol and smoking Thin BMI <22 Testosterone low Early menopause Renal/liver failure Erosive bone disease (RA) Dietary calcium low
OSTEOPOROSIS
Gold standard diagnosis?
DEXA scan- only needed for <75 years
OSTEOPOROSIS
Treatment? (lifestyle)
- cessation of smoking
- alcohol
- calcium/ vit D increase
- weight bearing exercise
OSTEOPOROSIS
Medical treatment?
1st- Bisphosphonates
2nd - strontium ranelate
3) Teriparatide
4th- denosumab
SYSTEMIC LUPUS ERYTHEMATOSUS
Epidemiology?
- Women aged 20-40
- F:M 9:1
- Afro-american
SYSTEMIC LUPUS ERYTHEMATOSUS
Pathogenesis?
1) Apoptotic cell fragments aren’t closed fully by phagocytes
2) Taken up by APC’s in lymphoid tissue
3) Self antigens presented to T cells, stimulates B cells
4) Increase in complement activation, immune complex deposition and neutrophils = CLINICAL MANIFESTATIONS
SYSTEMIC LUPUS ERYTHEMATOSUS
Symptoms and Signs? (by organ)
Skin - butterfly/ Malar rash, photosensitivity
MSK- myalgia, arthralgia
general- tired, malaise, fever
CVS- Raynaud’s & pericarditis
Blood- anaemia, thrombocytopenia, leukopenia
Renal- proteinuria
Neuro- Epilepsy, migraines, neuropathies
SYSTEMIC LUPUS ERYTHEMATOSUS
Diagnosis?
4 of the Signs
FBC= anaemia, thrombocytopenia, leukopenia
increased ESR and normal CRP = Lupus
low complement factors (C3&4)
presence of anti-nuclear antibody (ANA)
What does ESR stand for?
erythrocyte sedimentation rate
SYSTEMIC LUPUS ERYTHEMATOSUS
Treatment?
Major organ involvement= IV Cyclophosphamide
Just MSK manifestation= PO prednisolone
For rashes= topical steroids and avoid sun
Maintenance- NSAIDs, hydroxychloroquine, steroids, azathioprine/ methotrexate
ANTIPHOSPHOLIPID SYNDROME
What is it?
- Recurrent thromboses/ miscarriages
- Persistently negative blood tests for antiphospholipid antibodies
ANTIPHOSPHOLIPID SYNDROME
Cause?
C- Coagulation defect
L- Livedo reticulosis (lace-like purplish discoloration of the skin)
O- Obstetrics (miscarriage)
T- Thrombocytopenia
ANTIPHOSPHOLIPID SYNDROME
Features?
Arteries- stroke, TIA, MI
Veins- DVT
Miscarriages
ANTIPHOSPHOLIPID SYNDROME
Treatment?
No previous thromboses = Aspirin/Clopidogrel
Previous thromboses = Warfarin/ NOAC
Pregnant = Aspirin and Heparin
POLYMYOSITIS/ DERMATOMYOSITIS
What are they and what is the difference?
DERMATOMYOSITIS involves the skin
POLYMYOSITIS/ DERMATOMYOSITIS
What are they?
- Inflammation of muscle
- progressive symmetrical proximal muscle weakness
- autoimmune mediated striated muscle inflammation (myositis)
POLYMYOSITIS/ DERMATOMYOSITIS
Signs?
1) Proximal muscle wasting
2) Proximal muscle weakness
3) Macular rash
4) General (fever, malaise)
5) Arthralgia
6) Hard to move (e.g. off of a chair/ up the stairs)
POLYMYOSITIS/ DERMATOMYOSITIS
Specific dermatomyositis features?
purple eyelids and scaly red plaques on knuckles
POLYMYOSITIS/ DERMATOMYOSITIS
Tests?
- Muscle biopsy
- Electromyography
- Creatine Kinase increased
-Anti-JO antibodies (SPECIFIC)
POLYMYOSITIS/ DERMATOMYOSITIS
Treatment?
1st - PO prednisolone
2nd- Azathioprine/ methotrexate
SYSTEMIC LUPUS ERYTHEMATOSUS
Symptoms and Signs by the Pneumonic-
Serositis Oral ulcers Arthritis Photosensitivity Blood disorders (low RBC,WBC,Platelets) Renal disorders (lupus nephritis) Antinuclear Ab Immunological disorder (anti-dsDNA/ antiphospholipid Ab) Neurological disorder (cerebral lupus)
Malar rash- fixed erythema over malar eminence
Discoid rash - erythromatous raised patches with adherent keratotic scaling and scarring
GOUT
What is it and what is the male to female ratio?
Hyperuricaemia and intra articular sodium urate crystals
GOUT
How may hyperuricaemia occur?
(aetiology)
Increased production- psoriasis, genetics, diet (shellfish, red meat, alcohol)
or
Decreased excretion from the kidneys - (CKD, NTN, thiazides, alcohol)
90% IS IDIOPATHIC
GOUT
Signs?
- Acute severe pain
- swelling and redness (inflammation)
50% occurs at 1st MTPJ
GOUT
What is it precipitated by?
- cold
- alcohol
- diuretics
GOUT
Investigations?
- Joint aspiration- shows urate crystals in synovial fluid
- X-ray shows:
1) Soft tissue swelling
2) Peri-articular erosions
3) Norma joint space
GOUT
Treatment?
- NSAIDs, Colchicine, Steroids (prednisolone injection)
- Allopurinol