MSK Flashcards
What are the 4 key X-ray findings in osteoarthritis?
Loss of joint space
Osteophytes
Subchondral stenosis (increased density in bone along joint line)
subchondral cysts (fluid filled holes in bone)
What are the key presentations of osteoarthritis?
joint stiffness and pain, worsened with activity
What signs of osteoarthritis may be present on the hands?
heberdens nodes (DIPs)
bouchards nodes (PIPs)
squaring at the base of the thumb
What lifestyle factors may help symptoms of osteoporosis?
losing weight
physiotherapy
What oral medications can be used to control symptoms of osteoarthritis?
paracetamol - 1st line
NSAIDs + PPI - 2nd line
what are the other treatments for osteoarthritis?
intra-articular steroid injections
hip/knee replacement
What antibody is present in 70% of patients with RA?
rheumatoid factor (RF)
What antibody predates the development of RA and is more specific and sensitive to RA?
anti-CCP antibodies
What are the key presentations of RA?
symmetrical distal polyarthropathy
joint pain, stiffness and swelling
How does activity effect the pain from RA?
it improves it
What is palindromic rheumatism?
short episodes of inflammatory arthritis
Which joints are almost never effected in RA but are often effected in osteoarthritis?
distal interphalangeal joints
What are the X-ray findings of RA?
Loss of bone space
osteopenia
erosion of bone
swelling of soft tissue
What hand deformities are common with RA?
Z shaped thumb
swan neck deformity
boutonnieres deformity
ulnar deviation of fingers at the knuckle
What is swan neck deformity?
extension of the PIPs and flexion of the DIPs
What is boutonnieres deformity?
extension of the DIPs and flexion of the PIPs due to a tear in the central slip of the finger extensors
What are some of the extra-articular manifestations of rheumatoid arthritis?
pulmonary fibrosis
bronchiolitis obliterans
feltys syndrome
sjogrens syndrome
What blood tests can be used to diagnose RA?
anti-CCP antibodies and RF
ESR/CRP
What are the 4 diagnostic criteria for RA?
- number/size of joints affected
- serology (anti-CCP, RF)
- inflammation (CRP/ESR)
- duration of symptoms (</>6 weeks)
score is added up
What score is used to monitor RA and response to treatment?
DAS28 score
What combination of medications can be used initially or with flare ups of RA?
NSAIDs/Cox-2i + PPIs
what is the 1st line treatments for RA?
monotherapy with either:
methotrexate, sulfasalazine or leflunomide
Give an example of an anti-TNF drug used to treat RA
infliximab, adalimumab
Give and example of an anti-CD20 drug used to treat RA
rituximab
What is the action of methotrexate?
it interferes with folate metabolism and suppresses the immune system
What are the side effects of methrotrexate?
mouth ulcers and mucositis
liver toxicity
damages bone marrow - low WCC
teratogenic (harmful in pregnancy)
What is the action of leflunomide?
it is an immunosuppressant that effects the production of pyrimidine (DNA synthesis)
What are the side effects of leflunomide?
hypertension
peripheral neuropathy
How does sulfasalazine work?
not clear but seems to effect folate metabolism, is an immunosuppressant and anti-inflammatory
What are the side effects of sulfasalazine?
temporary male infertility
can be used in pregnancy
What is action hydroxychloroquine?
interferes with toll-like receptors - immunosuppressant
What are the side effects of hydroxycholorquine?
nightmares
reduced visual acuity
What is tumour necrosis factor (TNF)?
a cytokine involved in inflammation
What are some of the side effects of anti-TNF drugs?
vulnerability to sepsis and infection
reactivation of TB or hep B
What are the main side effects of rituximab?
night sweats
thrombocytopenia
What is the action of rituximab?
monoclonal antibody against B cells
What medications can be a risk factor for oeseoporosis?
long term corticosteroids
SSRIs, PPIs
anti-oestrogens
anti-epileptic
what tool is used to assess the 10 year risk of fragility fracture?
FRAX tool
What is the first line treatment for osteoporosis?
bisphosphonates - alendronate, zoledronic acid
What are some of the side effects of bisphosphonates?
reflux and oesophageal erosions
What is the key sign of SLE?
malar rash that gets worse in the sunlight
What other symptoms/signs may be present in SLE?
hair loss
SOB
arthralgia
myalgia
hepatomegaly
lymphadenopathy
What type of hypersensitivity is SLE?
type 3
What antibodies is SLE associated with?
anti-nuclear antibodies (ANA)
What antibody is highly specific to SLE?
anti-smith
What are the two criteria used for diagnosis of SLE?
SLICC or ACR criteria
involves presence of ANA and certain symptoms
What are some of the complications of SLE?
cardiovascular disease
infection
lupus nephritis
interstitial lung disease
anaemia
pericarditis
(all related to inflammation)
What is the first line treatment for mild SLE?
hydroxychloroquine
What other initial medication may be used for SLE?
NSAIDs
prednisolone
What medication may be used in more severe SLE?
methotrexate
What is antiphospholipid syndrome?
disorder associated with antiphospholipid antibodies that causes a hyper-coagulable state
What are the main associations with antiphospholipid syndrome?
venous thromboembolism (DVT)
arterial thrombosis (stroke)
miscarriage
What condition can cause antiphospholipid syndrome?
SLE
What antibodies in antiphospholipid syndrome associated with?
lupus anticoagulant
anticardiolipin antibodies
anti-beta-2 glycoprotein 1 antibodies
What is the diagnostic criteria for antiphospholipid syndrome?
at least on clinical characteristic and at least one antibody
What is the management for antiphospholipid syndrome?
warfarin
What is the management for antiphospholipid syndrome in pregnancy?
LMWH (warfarin contraindicated in preg)
+ aspirin to reduce chance of complications in pregnancy
What is Sjogrens sydnrome?
an autoimmune condition that effects the exocrine glands leading to dry mucous membranes
what are the typical symptoms of Sjorgens?
dry eyes, mouth, vagina
What is secondary Sjorgens syndrome?
Sjorgens related to SLE or RA
What antibodies is Sjorgens syndrome associated with?
anti-Ro, anti-La
What test can be used to assess the dryness of eyes?
schirmer tear test
What medication can be used to halt the progression of Sjogrens?
hydroxychloroquine
What is raynauds associated with?
SLE, RA, systemic sclerosis, dermatomyositis
What are the two main patterns of disease in systemic sclerosis?
limited cutaneous systemic sclerosis
diffuse cutaneous systemic sclerosis
What are the features of limited cutaneous systemic sclerosis?
calcinosis
raynauds
oesophageal dysmotility
sclerodactyly
talengiectasia
What extra features does diffuse cutaneous systemic sclerosis have?
cardiovascular - hypertension/CAD
pulmonary - hypertension/fibrosis
renal - glomerulonephritis
What is scleroderma?
hardening of the skin
What is sclerodactyly
loss of range of motion in the hands
hat is talengiectasia
dilated blood vessels in the skin
What is calcinosis?
calcium deposits under the skin, often in the fingertips
What antibodies are positive in most patients with systemic sclerosis?
anti-nuclear antibodies
What examination can help diagnose systemic sclerosis?
nailfold capillaroscopy
(looking at the capillaries under a microscope in the nail bed)
What lifestyle changes can help systemic sclerosis?
physio
gentle skin stretching
no smoking
avoid cold triggers
What medications can be used for diffuse systemic sclerosis?
Steroids/immunosuppresants
What is poly/dermatomyositis?
autoimmune disorder when there is inflammation of the muscle/skin and muscles
What is the key investigation for mysositis?
raised serum creatine kinase
What can cause myositis?
cancers - lung, breast, ovarian, GI
What is the presentation of myositis?
bilateral muscle pain, weakness and fatigue
normally proximal muscles
effects shoulder and pelvic girdle
occurs over several weeks
what are the main skin features of dermatomyositis
Gottron lesions - scaly red patches on knuckles of hand
photosensitive erythematosus on back, shoulders and neck
What antibodies are present in myositis?
antinuclear, anit-Jo-1, anti-Mi-2
What is the first line treatment for poly/dermatomyositis?
corticosteroids - prednisone
What is paget’s disease?
a disorder that results in increased bone turnover
what are the key presentations of pagets disease?
bone pain
enlarged bone pain
fractures
hearing loss (bones in ear)
What is one of the key xray presentations of pagets disease?
cotton wool appearance - areas of sclerosis and lysis (dense and thin bone)
What may be seen in LFTs in pagets disease?
raised alkaline phosphatase
What is the main treatment for pagets disease?
bisphosphonates - alendronate
What are the two key complications of pagets disease?
osteogenic sarcoma (bone cancer)
spinal stenosis
Name two conditions in which vit D deficiency is common
IBD, CKD
apart from osteomalacia, what can low Vit D lead to?
secondary hyperparathyroidism as parathyroid detects low calcium
What are the potential symptoms of osteomalacia?
bone pain
fatigue
muscle pain/weakness
abnormal fractures
What blood test can be used to investigate potential osteomalacia?
25-hydroxyvitamin D will be low
How is osteomalacia treated?
colecalciferol (vit D supplementation)
What is septic arthritis?
infection in the joint - present with red, swollen joint
What is the management of septic arthritis?
septic six
oxygen
IV antibiotics
IV fluids
joint aspiration - culture
check lactates
and urine output
What is reactive arthritis?
synovitis as a reaction to an infective trigger without infection in the joint?
What 3 symptoms are associated with reactive arthritis?
cant see, pee or climb a tree
bilateral conjunctivitis
anterior uveitis
circinate balanitis (dermatitis at the head of the penis)
What are gouty tophi?
subcutaneous deposits of uric acid
Which joints does gout most typically effect?
DIPs, base of thumb/big toe, wrist
What will joint aspirated fluid show in gout?
no infection
needle shaped crystals
negatively birefringent of polarised light
monosodium urate crystals
What would be seen on an x ray of of a joint with gout?
joint space maintained
punched out erosions
lytic lesons
overhanging edges
What would blood tests show in gout?
hyperuricaemia
What medications can increase the amount of uric acid?
thiazide like diuretics
insulin
What dietary factors can increase purines and hence uric acid?
meat and seafood
What is the first line treatment in acute flair ups of gout?
NSAIDs
What can be used instead of NSAIDs to treat acute gout?
colchicine
What prophylactic treatment can be started after stabilisation of acute gout?
xanthine oxidase inhibitors - allopurinol
What is pseudogout?
crystal arthropathy caused by calcium pyrophosphate crystals
what will be shown on joint aspiration in pseudogout?
no bacteria
calcium pyrophosphate crystals
rhomboid shaped crystals
positively birefringent of polarised light
What is a common x ray finding of pseudogout?
chondrocalcinosis, a thin white line in the joint caused by calcium deposition
What other condition does psuedogout present similarly to on x ray?
osteoarthritis
Loss of joint space
osteophytes
subchondral cysts
subarticular sclerosis
What is the management of pseudogout?
if symptomatic - NSAIDs/steroids
What is the most common route of infection in osteomyelitis?
haemotogenous osteomyelitis - through the blood
What might x rays show in osteomyelitis?
periosteal reaction
destruction of bone
localised osteopenia
What is the best imaging tool to diagnose osteomyelitis?
MRI
What surgical treatment is used for osteomyelitis?
surgical debridement (cleaning) of infected bone/tissue
What medications are used to treat osteomyelitis?
6 week course of flucloxacillin
What are the seronegative spondyloarthropathies?
ankylosing spondylitis
reactive arthritis
psoriatic arthritis
inflammatory bowel disease arthritis
What gene are the seronegative spondyloarthropathies related to?
HLA B27 gene
What joints does ankylosing spondylitis mainly effect?
sacroiliac joints, vertebral column
How does ankylosing spondylitis effect joints?
causes inflammation - stiffness and pain
eventually causes fusion
What are some of the other symptoms of ankylosing spondylitis?
anterior uveitis
chest pain - costosternal inflammation
weight loss, fatigue
What test is used to assess the flexibility of the spine and help diagnose AS?
schober’s test
What other tests can be done for AS?
HLA B27 genetic testing
CRP/ESR
What would be seen on x ray of a spine in AS?
bamboo spine
squaring of vertebral bodies
fusion
What medications can help with pain in AS?
NSAIDs
What medication can be used in flair ups of AS?
steroids
What other medications can be used in AS?
anti-TNF - infliximab
What are the signs/symptoms of reactive arthritis?
stiff, swollen and painful joints
psoriatic plaques
dactylitis
how is reactive arthritis treated?
NSAIDs, corticosteroids, anti-TNF
What is polymyalgia rheumatica?
an inflammatory condition mainly effecting the shoulder, neck and pelvic girdle
What are the typical presentations of polymyalgia rheumatica?
sleep disruption
morning stiffness
What is giant cell arteritis?
inflammation of the medium and large arteries, typically the temporal arteries
what is the main complication of giant cell arteritis?
vision loss
What are the key presentations of giant cell arteritis?
sever unilateral headache around temple
scalp tenderness
jaw claudication
blurred/double vision
How is giant cell arteritis diagnosed?
clinical manifestations
raised CRP
temporal artery biopsy
What is seen in temporal arterial biopsy in giant cell arteritis?
mutlinucleated giant cells
What is giant cell arteritis closely associated with?
polymyalgia rheumatica
How are both giant cell arteritis and polymyalgia rheumatica treated?
steroids - prednisone
What is fibromyalgia?
chronic pain syndrome - widespread over body
What is osteosarcoma?
primary bone malignancy in kids
metaphysis of long bone
What is ewing sarcoma
very rare, arises for mesenchymal cells in the bone
What is osteochondroma?
benign overproduction of bone
What is Behçets’s disease?
a complex inflammatory condition
What are the key presentations of Behçets’s disease?
mouth and genital ulcers
What test can be used to diagnose Behçets?
pathergy test
How is Behçets treated?
prednisolone