Rheumatology Flashcards
risk factors for OA?
- obesity
- ageing
- occupation
- trauma
- being female
- FHx
LOSS: XR changes seen in OA?
- Loss of joint space
- Osteophytes
- Subarticular sclerosis
- Subchondral cysts
presentation of OA?
- joint pain
- joint stiffness
- worsened by activity
- joint deformity
- atlantoaxial subluxation of C-spine
- reduced ROM
commonly affected joints in OA?
- hips
- knees
- sacro-iliac joints
- DIPs
- MCP of thumb
- wrist
- C-spine
hand signs in OA?
- herberden’s nodes at DIPs (never seen in RA)
- bouchard’s nodes at PIPs
- squaring at base of thumb
- weakened grip
- reduced ROM
how is OA diagnosed?
- clinical diagnosis if >45 and these 2 present:
- activity-related joint pain
- no morning stiffness (or lasts <30 mins)
management of OA?
- advise to lose weight
- physiotherapy
- occupational therapy
- orthotics
- analgesia
- intra-articular steroid injections
- hip / knee replacements
describe the 3 steps in analgesia for OA
- PO paracetamol / topical NSAIDs / topical capsaicin
- PO NSAIDs + PPI (omeprazole for gut)
- opiates (codeine, morphine)
what is RA?
inflammatory, symmetrical polyarthritis
genetic associations for RA?
- HLA DR4
- HLA DR1
antibodies found in RA?
- anti-CCP (gold standard)
- RF in 70%
presentation of RA?
- joint pain, swelling, stiffness
- onset can be as fast as overnight or take months-years
- typically MCPs and PIPs of hands affected (DIP-sparing)
- fatigue
- weight loss
- flu-like illness
- muscle aches and weakness
- short duration if palindromic rheumatism
- atlantoaxial subluxation
what is palindromic rheumatism? when would you worry?
- short, self-limiting episode of inflamm arthritis
- when anti-CCP present in blood (almost definitely goes on to develop RA)
what is atlantoaxial subluxation? what is the main complication?
- axis (C2) and atlas (C1) fuse together
- spinal cord compression
hand signs in active RA?
- “boggy” feeling synovium around joints
- Z-shaped deformity of thumb
- swan neck deformity
- boutonnieres deformity
- ulnar deviation at MCP joints
describe swan neck deformity
- hyperextended PIP
- flexed DIP
describe boutonnieres deformity
- hypextended DIP
- flexed PIP
systemic signs of RA?
- caplan’s syndrome
- bronchiolitis obliterans
- felty syndrome (RA, neutropenia and splenomegaly)
- sjogren’s syndrome
- anaemia of chronic disease
- CVD
- eye signs
- rheumatoid nodules
- lymphadenopathy
- carpel tunnel syndrome
- amyloidosis
what is caplan’s syndrome? where is it seen?
- pulmonary fibrosis with pulmonary nodules
- RA
triad of felty syndrome?
- RA
- neutropenia
- splenomegaly
eye signs of RA? hint: everything inflamed af
- scleritis
- episcleritis
- keratitis (inflamed cornea)
- keratoconjunctivitis sicca (dry conjunctiva and cornea)
- cataracts (due to steroids)
- retinopathy (due to chloroquine)
investigations in RA?
- bloods (RF, anti-CCP, CRP, ESR)
- XR hands
- XR feet
- USS shows synovitis
X-ray changes seen in RA?
- joint destruction
- joint deformity
- soft tissue swelling
- periarticular osteopenia
- bony erosions
why should patients with persistent synovitis be referred? when does it become urgent?
- to rule out RA
- when symptoms have persisted >3m or small joints of hands / feet affected
scoring system used in RA diagnosis? how is it calculated? hint: it u
- disease activity score 28 (DAS28)
- looks at tenderness / swelling in 28 joints
- takes ESR and CRP into account too
what is the health assessment questionnaire (HAQ) used for? when is it used?
- to measure functional ability in RA
- done at diagnosis to monitor response to treatment
factors indicating a poor prognosis in RA?
- being male
- younger onset
- more joints / organs affected
- RF / anti-CCP antibodies present
- erosions on XR
management of RA?
- steroids for initial presentation and acute flare ups
- DMARDs, following ladder
- surgery
describe the DMARD ladder in RA?
- 1st line: monotherapy with methotrexate / leflunomide / sulfasalazine / hydroxychloroquine (mild)
- 2nd: add another one of above
- 3rd: methotrexate + TNF inhibitor (e.g. infliximab)
- 4th: methotrexate + CD20 inhibitor (rituximab)
examples of TNF inhibitors? important side effect of these?
- adalimumab
- infliximab
- immunosuppression
how is methotrexate prescribed? what gets co-prescribed?
- IM / SC injection or weekly tablet
- 5mg folic acid to be taken weekly, but on a different day
side effects of DMARDs?
- mouth ulcers
- liver toxicity
- leukopenia (due to bone marrow suppression)
- teratogenic
unique SE of methotrexate?
pulmonary fibrosis
unique SEs of leflunomide?
- HTN
- peripheral neuropathy
unique SE of sulfasalazine?
reduces sperm count in men
unique SEs of hydroxychloroquine?
- nightmares
- reduced visual acuity
which underlying diseases could be reactivated by anti-TNF therapy?
- TB
- hep B
unique SEs of rituximab?
- night sweats
- thrombocytopenia
what is psoriatic arthritis (PsA)? which group of conditions is it in?
- an inflammatory arthritis associated with psoriasis
- one of the seronegative spondyloarthropathies
what % of psoriasis patients also have PsA?
up to 20%
signs of PsA?
- psoriatic plaques on skin
- nail pitting
- onycholysis
- dactylitis
- enthesitis
describe onycholysis
nail coming off the nail bed
which conditions might be associated with PsA?
- conjunctivitis
- anterior uveitis
- aortitis (inflamed aorta)
- amyloidosis
screening tool for PsA? who gets it?
- psoriasis epidemiological screening tool (PEST)
- all psoriasis patients
X-ray changes seen in PsA?
- periostitis
- ankylosis
- osteolysis
- dactylitis
- pencil-in-cup appearance
what is arthritis mutilans? which body part is affected? key finding?
- most severe form of PsA
- osteolysis of joints in fingers, causes skin to fold over
- “telescopic finger”
management of PsA?
- similar to RA
- NSAIDs for pain
- DMARDs
- anti-TNFs
- last line: ustekinumab (targets IL-12 and IL-23)
pathophysiology of reactive arthritis? old name for this?
- synovitis in joints in response to recent infection
- reiter syndrome
presentation of reactive arthritis?
- hot, red, swollen joint
- bilateral conjunctivitis
- anterior uveitis
- circinate balanitis
useful acronym for reactive arthritis presentation?
can’t see can’t pee can’t climb a tree
key differential of reactive arthritis?
septic arthritis
common infective triggers of reactive arthritis?
- any cause of gastroenteritis
- chlamydia is most common STI preceding this
- gonorrhoea more likely to cause gonococcal septic arthritis
management of reactive arthritis?
- ABx according to local guidelines until septic arthritis ruled out, then:
- NSAIDs
- steroid injections at joint
- systemic steroids if multiple joints affected
investigations for reactive arthritis? why are these done?
- joint aspiration
- gram staining, culture and sensitivity
- to rule out septic arthritis
prognosis in reactive arthritis?
- very good
- most resolve in 6 months and never recur
mortality rate in septic arthritis?
10%
which procedure increases the risk of septic arthritis?
joint replacement
presentation of septic arthritis?
- typically only 1 joint affected
- hot, red, swollen joint
- stiffness
- reduced ROM
- systemic: fever, lethargy, sepsis
most common infective organism in septic arthritis?
staph aureus
bacterial causes of septic arthritis?
- staph aureus (commonest)
- gonococcus
- strep pyogenes (and other group A streptococci)
- H. influenza
- E. coli
differentials for septic arthritis?
- reactive arthritis
- gout
- pseudogout
- haemoarthrosis
management of septic arthritis? which ABx would you choose?
- empirical IV ABx initially
- continued for 3-6 weeks
- e.g. flucloxacillin + rifampicin 1st line
- vancomycin if penicillin allergy / MRSA / prosthetic joint
- joint aspirate for staining, microscopy, culture and sensitivities
- then tailor ABx to sensitivities
what is ankylosing spondylitis? which group is it in?
- inflammatory arthritis affecting spine, causing stiffness and pain
- seronegative spondyloarthropathies
what groups the seronegative spondyloarthropathies together?
all linked to HLA B27 gene
which conditions come under seronegative spondyloarthropathies?
- ankylosing spondylitis
- IBD-related (enteropathic) arthritis
- reactive arthritis
- psoriatic arthritis
- undifferentiated spondylitis
typical demographic affected by ankylosing spondylitis?
- young male in teens / 20s
- M:F = 3:1
presentation of ankylosing spondylitis?
- lower back pain
- lower back stiffness
- sacroiliac pain
- pain worsened by rest, improves on movement
- pain may wake patient at night, gets better throughout day
key complication in ankylosing spondylitis?
vertebral fractures
non-spinal signs of ankylosing spondylitis?
- systemic (weight loss, fatigue)
- chest pain (from costovertebral joints)
- plantar fasciitis, achilles tendonitis (from enthesitis)
- dactylitis
- anaemia
- anterior uveitis
- aortitis
- heart block
- restrictive lung disease
- pulmonary fibrosis in 1%
- IBD