Connective Tissue Disorders Flashcards

(48 cards)

1
Q

Sjogrens

A

Autoimmune condition characterised by lymphocytic infiltrates in exocrine organs.

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2
Q

Sjogrens Symptoms

A
Dry mouth, eyes and vagina.
Poor dental health.
Myalgia and Arthralgia.
Raynauds
Parotid gland swelling
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3
Q

Sjogrens associated conditions

A

Peripheral neuropathy and interstitial lung disease

Increased risk of lymphoma

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4
Q

Immunology in Sjogrens

A

Anti Ro and Anti La

Raised IgG and plasma viscosity.

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5
Q

Diagnosis of Sjogrens

A

Ocular dryness
+ve anti-Ro and anti-LA antibodies
Lip gland biopsy

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6
Q

What test is used to determine ocular dryness?

A

Schirmers test

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7
Q

Sjogrens treatment

A

Largely symptomatic e.g lubricating eye drops etc

Regular dental care

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8
Q

If the patient with Sjogrens has arthralgia what can be used?

A

Hydroxychloroquine

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9
Q

Systemic sclerosis

A

Multisystemic autoimmune disease characterised by vasculopathy autoimmunity + fibrosis.

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10
Q

Systemic sclerosis

Cutaneous Presentation

A
Raynauds
Skin becomes thickened and tight leading to Beaking of the nose, Atrophy of the fingertips 
Telangiectasia 
Calcinosis
Sclerodactyly
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11
Q

Systemic sclerosis

GI Presentation

A

Dysphagia, malabsorption, fluctuating diarrhoea/constipation, faecal incontinence

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12
Q

Systemic sclerosis

Pulmonary presentation

A

Pulmonary hypertension

Pulmonary fibrosis

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13
Q

Systemic sclerosis

Renal Presentation

A

Accelerated hypertension
Proteinuria
Worsening renal function

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14
Q

How can systemic sclerosis be divided?

A

Limited- Skin involvement in hand feet and face.
- Linked to anti centromere
- Organ involvement is later
Diffuse- skin involvement includes trunk.
- linked to Anti Scl-70 antibody
- early significant organ involvement.

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15
Q

Systemic Sclerosis treatment

A

No overall treatment instead tailor to specific systemic involvement.

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16
Q

Systemic sclerosis treatment - Raynauds

A

Primary Raynauds - Calcium Channel Blockers
- ARB’s Nitrates
Recurrent Digital Ulcers - PDE- 5 Inhibitor Sildenafil
- Bosentan endothelia receptor agonist.

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17
Q

Systemic Sclerosis treatment - Pulmonary hypertension

A

PDE 5 inhibitor Sildenafil
Bosentan
oOxygen

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18
Q

Systemic Sclerosis treatment - Pulmonary Fibrosis

A

Mycophenolate Mofetil
Cyclophosphamide ( for aggressive fibrosis)
Rituximab
Nintedanib (anti-fibrotic)

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19
Q

Systemic sclerosis renal presentation and treatment

A

Associated with Anti RNA polymerase III antibody
Uncontrolled hypertension and renal failure.
ACE or ARB +/- dialysis

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20
Q

Systemic sclerosis

GI treatment

A

PPI for for reflux to prevent GORD

21
Q

How does anti-phospholid syndrome manifest?

A

Recurrent venous or arterial thrombosis and/ or foetal loss.

22
Q

Common cutaneous presentation of anti-phospholipid syndrome?

A

Livedo reticularis

Mottled skin

23
Q

Treatment for anti-phospholipid syndrome

A

For those with episodes of thrombosis- Aspirin

Recurrent pregnancy loss- Low molecular weight heparin

24
Q

If patients with antiphospholipid syndrome have positive antibodies but no history of episode of thrombosis what happens?

A

No anti-coagulation is required simply monitor.

25
In systemic sclerosis what is CREST?
``` Calcinosis Raynauds Eosinophilic dysmotility Sclerodactyly Telangactasia ```
26
Gout causes
Renal under excretion | Excessive purine intake
27
Pathogenesis of gout
Deposition of urate crystals within joint. | Uric acid is final step in breakdown of purines.
28
Where is uric acid usually excreted?
2/3 excreted via renal system | 1/3 excreted via gastrointestinal system
29
What foods are rich in purines?
Alcohol, red meat and seafood.
30
What causes the precipitation of crystals out into the joint?
Dehydration, trauma, surgery and low temperatures.
31
Which joint is affected first in gout?
First metatarsalphalangeal joint. Base of the big toe.
32
How does gout present.
Asymmetrical inflamed joints. Movement is painful and doesn't alleviate symptoms.
33
What can gout mimic?
Septic arthritis
34
What is the blood concentration of uric acid required for gout?
>0.42 mol/l
35
How long do symptoms in gout persist?
7-10 days usually with no treatment.
36
What is gold standard diagnostic method for gout.
Aspirate the joint and observe fluid under cross polarised microscopy. Also stain with gram culture to exclude septic arthritis.
37
What do urate crystals look like under polarised microscopy?
Needle shaped negative birefringence.
38
What are gout tophi?
Deposition of uric acid within the soft tissue. Large white painless lumps which can burst through the skin.
39
Acute treatment of gout
NSAIDs Colchicine Steroids
40
Gout prophylaxis
Allopurinol however 2-4 weeks after acute episode. | Bridge 2-4 weeks with NSAIDs
41
Why is there a 2-4 week period after acute when allopurinol can't be used.
As for some reason it triggers a more severe acute attack if used during acute phase.
42
What causes pseudo gout?
Calcium pyrophosphate deposits
43
Pathogenesis of pseudo gout?
Deposition of calcium within hyaline cartilage. | Deposits break out into synovial cavity.
44
Underlying possible causes of pseudo-gout
Hyperparathyroidism Renal osteodystrophy Haemochromatosis Previous cartilage injury
45
Pseudo-gout diagnoses
Aspirate and remove fluid and examine under polarised microscopy.
46
What does pseudo gout look like in microscopy?
Rhomboid crystals
47
Pseudo-gout treatment
Only acute NSAIDs Colchicine | Hydration
48
In gout if people can't tolerate allopurinol what can be used?
Febuxostat