Clinical Consultation Flashcards
Common scenario leads which should make you think of Marfan’s?
Chest pain
SOB
Change in vision
Joint pains
Questions to think about when considering Marfan’s as a differential?
Chest pain
SOB
Fever, night sweats, weight loss, blood in urine, rash
Change to vision
Dislocated joints
Lumps in neck
Things you might find on inspection in a patient with Marfan’s?
Tall
Arachnodactyly
Kyphoscoliosis ± pectus excavatum/carinatum
Long arms vs torso
Thumb in fist - come out other side
Bend thumb against hand
Look quickly side to side - upwards lens dislocation - iris vibrate
Blue sclera
High arched palate
Mucosal neuroma’s
Pes planus - flat feet
What systems would you examine in a patient with suspected Marfan’s and what may you find?
CVS
- Collapsing pulse
- Prominent neck pulsations
- BP
- Feel for apex beat
- Early diastolic murmur - AR
- Ejection click and late systolic murmur - MV prolapse
Resp
- Check tracheal position
- Percuss/auscultate for pneumothorax
- Inspect axilla for chest drain scars
Abdo
- look for hernia
Legs
- Dural Ectasia - test for weakness
What are some differentials for Marfan’s syndrome
Homocysteinuria - no cardiac. cognitive impairment. downwards lens dislocation. Recurrent VTE
MEN2b - marfanoid, mucosal neuromas, medullary thyroid ca, phaeochromocytoma - no affect on heart or eyes
MASS phenotype - MV prolapse, non-progressive aortic root dilatation, skin and skeletal manifestations
Ehlers Danlos - increased hyper mobility, skin fragility,
Pseudoxanthoma elasticum - AR, plucked chicken skin, angoid streaks on fundoscopy, blue sclera, screen for HTN and accelerated atherosclerosis
What investigations would you do in a patient with suspected Marfan’s?
Bedside
- ECG
- BP - wide pulse pressure
- Temp, fundoscopy, urine dip - ?IE
Bloods depend on presentation - r/o infections/PE
Imaging
- CXR - cardiomegaly, pulmonary oedema, wide mediastinum
- Echo - annually - monitor aortic root diameter and for AR
Special
- Can do genetic tests but diagnosis usually on Ghent criteria
How is Marfan’s managed?
Counsel patient - familial component, risk of pneumothorax and heart disease
Information leaflets and support groups
Screen family members
MDT - PT/OT, Cardiologist, genetic counsellors, resp, rheum, ortho, ophthalmologist, GP
Medical
- Manage co-morbidities
- Beta blocker and ACEi to slow AR dilation
Surgical
- AV replacement
- Aortic root repair - if >5cm
What are some causes of a high arched palate?
Marfan’s
Turner’s syndrome
Homocysteinuria
Noonan’s syndrome
Freidrichs ataxia
What is the genetic defect in Marfan’s and how is it inherited?
Autosomal Dominant
FNB1 gene on chromosome 15 encoding Fibrillin-1 - complete penetrance but variable phenotype
What can cause a blue sclera?
Marfan’s
Ehlers Danlos
Pseudoxanthoma elasticum
Osteogenesis Imperfecta
Alkapturia - due to deposition. Others due to thin sclera
What is the cause of MEN2b
Spontaneous or autosomal dominant defect of RET proto-oncogene
Treated with thyroidectomy and close monitoring for phaeochromocytoma
What makes up the Revised Ghent Criteria?
Family hx of marfans
Aortic root dilatation or dissection
FNB1 mutation
Systemic score
What are features of the systemic score for Marfan’s?
Wrist sign
Thumb sign
Pectus Excavatum/Carinatum
Pes planus
Pneumothorax
Dural ectasia
Protrusion acetabula
Increased arm span:height ratio
reduced upper segment/lower segment ratio,
scoliosis or thoracolumbar kyphosis,
reduced elbow extension,
facial features (dolichocephaly, enophthalmos, downslanting palpebral fissures, malar hypoplasia, retrognathia),
skin striae,
myopia,
mitral valve prolapse
What are the indications for aortic root replacement in a patient with Marfan’s?
- Dilation >50mm
- Dilation >45mm + family hx of dissection
- Increasing by >3mm per year
What are the cardinal features of systemic sclerosis?
CREST syndrome
Calcinosis - usually found on fingertips
Raynauds
Oesophageal dysmotility
Sclerodactyly
Telangiectasia
Questions to ask regarding Raynaud’s?
Do hands change colour in the cold?
3 stages? - white –> blue –> red
How badly is it affected
Time to normalise
Develop ulcers in hands?
Family Hx
What skin changes may you see in systemic sclerosis?
Tight shiny thick skin
Telangiectasia
Bruising
Hypo/hyperpigmentation
Swollen extremities - non pitting
Lose fat pads in hands
What face changes may you see in systemic sclerosis?
Small mouth - microstomia
Peri-oral furrows
Pinched nose
Features of respiratory exam in suspected systemic sclerosis?
Fine end inspiratory crackle at bases
Don’t change with coughing
Features on CVS examination in suspected systemic sclerosis?
Raised JVP
Left parasternal heave
Palpable P2
Loud P2
Peripheral oedema
What is systemic sclerosis?
Autoimmune, inflammatory, fibrotic connective tissue disease
Unknown aetiology
Affect skin and internal organs