Paeds Rheum Flashcards
What are the three key causes of limping child that you mustn’t miss?
- infection / infl (esp osteomyelitis/septic arthritis)
- trauma (esp NAI)
- tumour
Osteomyelitis is most commonly caused by which bacterium?
Staph aureus
Osteomyelitis is infection of metaphysis of long bones. It usually happens by haematogeneous spread, or direct from soft tissue.
What bacterium commonly causes osteomyelitis in children with sickle cell anaemia?
salmonella in sick cell
What bacterium can cause osteomyelitis in immunocompromised children?
TB
X ray in osteomyelitis is initially normal. What would MRI show?
subperioesteal pus
What is the treatment for osteomyelitis?
Immediate IV Abx
then oral Abx for wks after
may need surgical drainage
What blood tests would you do if suspect osteomyelitis?
Blood cultures
WCC, CRP/ESR
What bacterium usually causes septic arthritis in older children?
Staph aureus
also consider Neisseria gonorrhoea in sexually active
In babies, what bacteria cause septic arthritis?
Kingella kingi
Group B strep
(group B strep also causes osteomyelitis in neonates)
What is the treatment for septic arthritis?
Immediate IV Abx
may need washout / surgical drainage
What is the medical name for “irritable hip” in 2-10 yr olds?
Transient synovitis
What is commonest cause of acute hip in 2-10 yr olds?
Transient synovitis
What is the treatment for transient synovitis?
self-limiting! Rest and analgesia! resolves in <1wk
What percentage of children with transient synovitis go on to develop Perthe’s disease?
3%
In transient synovitis, does the child usually have pain at rest?
no
Which criteria distinguish Septic arthritis from transient synovitis?
Kocher’s criteria
Kocher’s criteria indicating septic arthritis are…..(x4)
fever >38.5
non-weight bearing
raised ESR
raised WCC
3 key risk factors for developmental dysplasia of the hip?
female
breech birth
positive FHx
What are the clinical examinations for DDH?
Barlow
Ortolani
what investigation confirms diagnosis of DDH
ultrasound
what is treatment for DDH?
Pavlik harness (flexed abducted) older - surgery
idiopathic avascular necrosis of the femoral head. whats this?
Perthes disease
What would Bart Simpson get?
Perthe’s disease (short schoolboys age 5-10, low socioeconomic)
In Perthe’s disease they get hip pain which develops over a few weeks, limp, and reduced range of movement in which directions?
all ROMs!
What is the treatment for Perthe’s disease?
physio, rest in cast/braces
< 6yrs - observation
>6 yrs - surgery for deformities
What does SCFE stand for?
“slipped capital femoral epiphysis” - epiphysis of femoral head SLIPS off the back!
Which age group does SCFE affect?
adolescents
What kind of pain does SCFE cause?
hip pain referred to knee.
limp
SCFE affects adolescents with what body types?
obese
or just had a growth spurt
what is osgood-sclater disease?
osteochondritis of the patellar tendon where inserts at the knee
Sporty adolescent male Charlie Knox has knee pain after exercise, localized tenderness on knee cap, and swelling over tibial tuberosity. What treatment do you recommend?
decrease activity :(
physio (quads strengthening and hamstring stretching)
softening of articular cartilage of patella = ?
chrondromalacia patellae
Adolescent female with knee pain standing up and walking upstairs ?
chrondromalacia patellae (Ailsa Bell)
what is the treatment for chondromalacia patellae?
phsyio (Paul) - quads strengthening
what is the most common form of arthritis in childhood?
reactive arthritis
which joints does reactive arthritis often affect in kids?
ankles and knees
in reactive arthritis, how long do they usuallly take until complete recovery?
UNDER 6 wks
name three common bacteria than lead to reactive arthritis is KIDS?
what about in teenagers?
kids: salmonella, shigella, campylobacter
teens: chlamydia, gonorrhoea
what causes reactive arthritis in low-income countries?
rheumatic fever (strep)
what is the treatment for reactive arthritis?
NSAIDs! complete recovery <6wks!
what would CSR/ERP and Xray of joint show in reactive arthritis?
CSR/ERP normal/raised
X ray normal!!
malignancy in children can cause leg pain. name two NON-BONE cancers that can cause leg pain
acute lymphoblastic leukaemia
neuroblastoma
what BENIGN bone tumour can cause leg pain?
osteiod osteoma (affects adolescent boys, pain at NIGHT, improves w NSAIDs)
what is the treatment for osteoid osteoma? (benign bone tumour)
surgical removal. (good prognosis)
name two malingant bone tumours which can cause leg pain in children
Osteosarcoma
Ewing sarcoma
adolescent male with persistent localized bone pain and mass. otherwise well. what are you thinking?
osteosarcoma or Ewing sarcoma
adolescent male with persistent localized bone pain and mass. you suspect osteosarcoma or ewing. what investigations?
X ray MRI bone scan (CT chest for lung mets) (bone marrow sampling)
what does X ray/MRI/bone scan show in osteosarcoma/ewing?
destruction + new bone formation
ewing - soft tissue mass
what is treatment for osteosarcoma/ewing?
what extra for ewing?
combination chemo
.. then surgery
ewing - radio for local
a 6 yr old with episodes of generalized pain in legs. wakes from sleep. symmetrical. never at start of day. no limp. Physical examination normal. What do you suspect?
growing pains!
What are the 5 rules for growing pains!
- 3-12 yrs
- symmetrical
- never at start of day / after walking
- no limp
- physical examination normal
what other problem is hypermobility associated with?
flat feet!
like me! I’m lucky I didn’t get chrondromalacia patellae!
symmetrical hyperextension of thumbs, fingers, elbows, knees. they can put their palms flat on floor with knees straight! Can cause MSK pain, often worse after exertion. What is this?
hypermobility
Hypermobility can be a normal finding especially in young girls. It can also be a feature of which 3 diseases?
- Down’s
- Marfan’s
- Ehlers Danlos
what is allodynia??
pain from a stimulus that doesnt usually cause pain
severe pain, hyperaesthesia and allodynia. worse with psychological stress. otherwise well and physical Ex normal. What is this?
“complex regional pain syndromes”
treat with physio & MDT
RIGHT KATE. Give me the 6 key causes of back pain in children. You can do it.
- Mechanical
- Tumour (benign)/Malignancy
- Discitis / osteomyelitis
- Compression of spinal cord/nerve root
- Spondylo-lysis!
- Schuermann disease
What is Schuermann disease?
osteochondrosis of vertebral body (hunchback + back pain)
dodgy ossification near the cartilage
What are the 2 key complications of Perthe’s disease?
osteoarthritis
premature fusion of growth plates
BackPainRedFlag - focal neuro defecit. What could this be?
- Compression of spinal cord/nerve root
BackPainRedFlag - high fever. What could this be?
- Discitis / osteomyelitis
BackPainRedFlag - night waking / persistent pain. What could this be?
- Malignancy
Name some back pain red flags. Don’t have to get them all just try hun
young age high fever night waking / persistent pain scoliosis which is painful focal neuro weight loss / systemic malaise
BackPainRedFlag - weight loss / systemic malaise. What could this be?
- Malignancy
BackPainRedFlag - scoliosis which is painful. What could this be? (x2)
- Maligancy
3. Discitis / osteomyelitis
Fixed thoracic kyphosis (hunchback) + back pain. Suspect?
Shuermann disease
Heavy schoolbag on one shoulder. Back pain. Likely cause?
Mechanical back pain
Which bone tumour is often found in spine?
osteoid osteoma (benign)
What is the treatment for discitis / osteomyelitis in spine?
IV Abx immediately!
How are you gonna do in these exams Kate?
FINE! :)
Define Juvenile Idiopathic Arthritis
umbrella term for …
persistent joint inflammation in under 16s,
lasting for 6wks,
with no identified cause.
Please name the 5 types of Juvenile Idiopathic Arthritis.
- Oligoarticular
- Polyarticular
- Psoriatic
- Enthesitis-related
- Systemic
How many joints does oligoarticular JIA affect?
<4
How many joints does polyarticular JIA affect?
> 4
Asymmetric. Mostly knee or ankle. Associated with chronic anterior uveitis. What kind of JIA is this?
Oligoarticular
Why do you arrange a 3 monthly eye screening for any child with JIA?
To check for UVEITIS
Which joints does polyarticular JIA tend to affect, and in what distribution?
symmetrical large and small joints, often fingers! can also be asymmetrical tho
This type of JIA can be Rheumatoid Factor positive or Rheumatoid Factor negative. Often with nodules and low-grade fever. Affects joints symmetrically.
Polyarticular (>4 joints)
What is prognosis of polyarticular JIA ?
Bad. Destroys joints. Causes overgrowth of bone on affected side. Can cause scoliosis.
Which type of JIA is also known as Still’s Disease?
Systemic JIA
Name some features of Systemic JIA.
arthralgia / myalgia salmon pink macular rash hepatosplenomegaly lymphadenopathy quotidian spiking temps
Which type of JIA has the highest mortality?
Systemic JIA (Still’s Disease)
Which type of JIA causes salmon pink macular rash?
Systemic JIA
Diagnosis of psoriatic JIA if:
- arthritis + actual psoriasis
or athritis plus (x3)…. ?
- Dactylitis
- Nail pitting
- First degree relly with PSORIASIS
Which JIA is like ANKYLOSING SPONDYLITIS, in that it inflames lumbar spine and sacroiliac joints?
enthesitis-related JIA (HLA-B27)
What is an enthesis?
the connective tissue between tendon/ligament and bone
Which joints does enthesitis-related JIA affect?
HLA-B27
lumbar spine
sacroiliac
also Achilles!
Name 4 risk factors for JIA.
female sex
age <6yrs
HLA polymorphism
FHx autoimmunity
JIA is a clinical diagnosis. But what bloods might be helpful?
FBC (normocytic anaemia) ESR/CRP ANA HLA-B27 RF
What percent of oligoarticular JIA are ANA positive?
70%
Most JIAs affect females more often than males. Except WHICH?
Enthesisitis-related JIA - males
If ANA is positive, this is associated with increased risk of what?
UVEITIS
HLA-B27 is positive in what 90% of which JIA?
enthesitis-related JIA
What imaging might you consider in JIA?
X-ray
ultrasound
MRI
Give me some non-pharma management of JIA.
MDT - OT and physio
try to do lots of sports, dance :)
support for family
Give me 5 types of medications which can be used in JIA.
NSAIDs / analgesics Corticiosteroids Methotrexate DMARDs Biologics
Give me 2 examples of DMARDs that may be used for JIA
sulfasalazine , leflunomide
This Biologic is used to treat patients with POLYARTICULAR JIA for whom methotrexate has failed. It is the only TNF blocker licensed for JIA.
Etanercept
Etanercept is a Biologic, the only TNF blocker licensed for treating JIA. When can it be used?
polyarticular, when methotrexate has failed
Give me two examples of Biologics used in JIA
etanercept (TNF blocker)
tocilizumab (IL-6 blocker)
Tocilizumab is a Biologic, an IL-6 blocker used for treating which kind of JIA?
Systemic JIA
when steroids + methotrexate have failed
Corticosteroids are used to treat JIA. In what forms are steroids used?
Intra-articular injections
Systemic steroids for quick symptom relief/systemic disease
Topical steroids for uveitis
Methotrexate is first line treatment for JIA (if multiple joints are affected or steroid injections not enough in a particular joint). How is it given? What should you monitor?
weekly methotrexate injections.
blood monitoring for liver & bone marrow
Name 6 complications of JIA
- chronic anterior uveitis.
- joint deformities
- growth failure
- anaemia of chronic disease
- delayed puberty
- osteoporosis
Why would osteoporosis be a complication of JIA?
corticosteroids + reduced weight bearing
Uveitis can lead to….
cataracts, glaucoma, possibly blindness
Which has polyarticular JIA has a worse prognosis, RF+ve or RF-ve ?
RF positive has worse prognosis
Who should be involved in the care of a child with JIA?
paediatricians rheumatology MDT opthalmologist arthritis nurse physio OT
What are the two types of oligoarticular JIA?
persistent
extended
Which type of JIA is tocilizumab used for?
systemic JIA
Why might a child with JIA have growth failure?
cortciosteroids + chronic disease