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Cardiopulmonary manifestations are serious
complications of SSc
Cardiopulmonary manifestations are the commonest causes of death in SSc2
27% of SSc-related deaths result from PAH2
25% of SSc-related deaths result from ILD2
36
34
31
9
0
10
20
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40
50
60
70
80
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100
Dea
th d
ue
to k
now
n c
ause
s (%
)
Heart
Lung
Heart & lung
1.Ferri C, et al. Medicine (Baltimore) 2002; 81:139-53.2.Steen V. Scleroderma Care Res 2006; 3:14-22.
*Kidney, cancer, miscellaneous
Other*
Causes of death in 1012 SSc patients1
Underlying mechanism of pulmonary fibrosis
Primary sites of injury and repair are regions of fibroblastic proliferation1
Epithelial cells produce pro-fibrotic factors, which may initiate fibrosis2
Endothelial damage has also been implicated as a possible co-factor1.Kuhn C 3rd, et al. Am Rev Respir Dis 1989; 140:1693-
703.2.Selman M, et al. Ann Intern Med 2001; 134:136-51.
Symptoms of SSc-ILD
Include dyspnoea on exertion, non-productive cough and inspiratory crackles
Prognosis linked to disease extent
Early detection important for best management
Gro
un
d-g
lass o
pacifi
cati
on
(%
)
0
20
40
60
80
100
IPF SSc NSIP
CT findings in SSc closely idiopathic NSIP but not IPF
Desai SR, et al. Radiology 2004; 232:560-7.
Diagnosis of SSc-ILD
CT shows reticular opacities, ground-glass opacity with little honeycombing
Pulmonary function tests: restrictive impairment, reduced diffusing capacity for CO, arterial hypoxaemia on exercise
Lung biopsy not warranted
Selman M, et al. Ann Intern Med 2001; 134:136-51.Bouros D, et al. Am J Respir Crit Care Med 2002; 165:1581-6.
Biopsy findings in SSc (n=80)
• NSIP n=62 (78%) - cellular NSIP, n=15 - fibrotic NSIP, n=47
• UIP n = 6• “End-stage lung” n = 6• RBILD n = 4• Others n = 2
Bouros D et al. Am J Respir Crit Care Med 2002;165:1581-6Bouros D et al. Am J Respir Crit Care Med 2002;165:1581-6
Bouros D et al. Am J Respir Crit Care Med 2002;165:1581-6Bouros D et al. Am J Respir Crit Care Med 2002;165:1581-6
The key clinical dilemma
We need to treat major pulmonary inflammation and progressive fibrosis.
But we need to avoid unnecessary treatment in inherently stable disease.
How do we decide? A trend towards routine screening for pulmonary fibrosis in CTD has made this a frequent issue.
“Indolent/stable disease”
MICO:
Masterful Inactivity
with Cat-like Observation
The role of the doctor is to amuse the patient while nature takes its course
Voltaire
Clinical needs
Decisions are dichotomous: treat or not, enrol in treatment trial or not
We need definition of high and low risk disease
We need “Group A and Group B”. We need to STAGE lung disease in the CTD
Who should be treated?
Shorter duration of systemic disease: studies of Steen
Observed progression: not quantified
More severe disease ………
The definition of “alveolitis”
Traditional view that treatment applies to patients with “alveolitis”
HRCT “alveolitis” has been defined
BAL “alveolitis” has been defined
“An alveolitis on BAL”
A neutrophilia or granulocytosis on BAL had predicted decline in four studies
The BAL dilemma: severity or intrinsic progressiveness?
• Severe disease is more likely to progress
• Does BAL simply reflect severity? If so, HRCT and PFT are more user-friendly!
• Does BAL disclose progressiveness, independently of disease severity?
0 10 20 30 40 50 60 70 80 90 1000
10
20
30
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70
80
90
100BAL neutrophils 4.0
BAL neutrophils > 4.0
p=0.02
time (mths)
Su
rviv
al (
%)
Neutrophilia in 70/148 cases (47%)Neutrophilia in 70/148 cases (47%)
HR = 2.41 [1.24, 4.56]HR = 2.41 [1.24, 4.56]
Effect confined to two year Effect confined to two year mortality on mortality on adjustment for severityadjustment for severity
Goh NS. Arthritis Rheum 2007; 56:205-212Goh NS. Arthritis Rheum 2007; 56:205-212
Other outcome analyses
• BAL neutrophil levels were not predictive of the rapidity of decline in FVC or DLco
• BAL lymphocyte and eosinophil content were not linked to any measure of outcome
Goh NS. Arthritis Rheum 2007; 56:205-212Goh NS. Arthritis Rheum 2007; 56:205-212
Strange C. Am J Respir Crit Care Med 2008; 177:91-98Strange C. Am J Respir Crit Care Med 2008; 177:91-98
A complementary statement
The study of Goh: long term follow-up but uncontrolled, variable treatment
The placebo-controlled SLS oral cyclophosphamide study: one year of follow-up
BAL neutrophil content did not predict progression in the placebo arm
In both the Goh and the Strange studies, BAL neutrophil content correlated with disease extent on HRCT
This fits nicely with old data
Wells A. Am J Respir Crit Care Med 1994; 150:462-468Wells A. Am J Respir Crit Care Med 1994; 150:462-468
BAL neutrophil content largely reflects severity
It does not reliably separate SSc patients into high and low risk groups
Other CTDs less studied
This is the archetypal SSc HRCT
Lots of ground-glass … but only 15% of Lots of ground-glass … but only 15% of SSc patients have reversible histologySSc patients have reversible histology
Often, some ground-glass is clearly fibrotic but some may be inflammatory
HRCT is only a rough guide
Ground-glass on HRCT is NOT synonymous with inflammation
The phrase “alveolitis on CT” should be banned
Staging by severity: SSc – what is needed
Simple, user-friendly system
Accurate depiction of high and low risk in moderately experienced hands
Conceptually easy
100
80
60
40
20
00 20 40 60 80 100 120
Limited
Duration of follow-up (months)
Extensive
Su
rviv
al (
%)
Disease extent determines mortality
Goh NSGoh NS. Am J Respir Crit Care Med.. Am J Respir Crit Care Med. 2008; 177:1248-54 2008; 177:1248-54
UKRSA staging
0 20 40 60 80 100 1200
20
40
60
80
100
Duration of follow-up (months)
Pro
gre
ssio
n-f
ree
su
rviv
al (
%)
Limited
Extensive
Disease extent determines rapidity of progression
Goh NSGoh NS. Am J Respir Crit Care Med.. Am J Respir Crit Care Med. 2008; 177:1248-54 2008; 177:1248-54
UK/RSA staging
HRCT extentHRCT extent
<20%<20% >20%>20% Indeterminate Indeterminate
Mild Mild DiseaseDisease
FVC >70%FVC >70% FVC <70%FVC <70%
Extensive Extensive DiseaseDisease
Goh NS, Goh NS, et al. Am J Respir Crit Care Med.et al. Am J Respir Crit Care Med. 2008 Mar 27; [Epub] 2008 Mar 27; [Epub]
The scleroderma lung study (SLS)
Multi-centred, double-blind, randomised, placebo-controlled trial
Investigated the effects of oral cyclophosphamide on lung function and health-related symptoms in patients with active alveolitis and SSc-ILD
145 patients completed at least 6 months of treatment
Tashkin DP, Tashkin DP, et alet al. . N Engl J MedN Engl J Med 2006; 2006; 354:2655-66.354:2655-66.
The Scleroderma Lung Study
Cyclophosphamide vs placeboForced vital capacity (FVC)
% of predicted*Cyclophosphami
den = 73
Placebon = 72
Baseline value (mean ± SE)
67.6±1.3 68.3±1.5
Value at 12 months(mean ± SE)
66.6±1.7 65.6±1.6
Difference (mean ± SE)
−1.0±0.92 −2.6±0.9
p-value p <0.05 after adjustment for baseline values in favour of
cyclophosphamide*Primary endpoint Tashkin DP, Tashkin DP, et alet al. . N Engl J MedN Engl J Med 2006; 354:2655- 2006; 354:2655-
66.66.
Limited support for a cyclophosphamide treatment effect in a subsequent placebo-controlled study of IV cyclophosphamide with low dose prednisolone and subsequent azathioprine
Hoyles RK, Hoyles RK, et alet al. . Arthritis RheumArthritis Rheum 2006; 2006; 54:3962-70. 54:3962-70.
Cyclophosphamide in SSc-ILD
In view of the results from two high quality RCTs and despite its known toxicity, cyclophosphamide should be considered for treatment of SSc-related interstitial lung disease
Treatment effect may be understated because of selction bias in placebo-controlled studies, leading to preferential enrolment of patients with indolent disease
Kowal-Bielecka O, et al. EULAR 2007.
Wells AU, Latsi P, McCune WJ (Editorial). Am J Respir Crit Care Med 2007; 176:952-3