Combined pulmonary fibrosis and emphysema
Updates to Article Attributes
Combined pulmonary fibrosis and emphysema (CPFE) is a possible new addition to a growing list of smoking-related lung disease characterised by the coexistence of usual interstitial pneumonia (UIP) or nonspecific interstitial pneumonia (NSIP) with emphysema in tobacco smokers.
Epidemiology
It typically occurs in male smokers 3. It is estimated to represent between 5-10% of cases of diffuse interstitial lung disease.
Clinical presentation
Clinical features include:
- tobacco smoking
- severe dyspnoea
- unexpected subnormal spirometry findings
- severely impaired transfer capacity for carbon monoxide
- hypoxaemia on exercise
Pathology
Although the pathogenesis and the exact association are yet to be elucidated in larger studies, it is important to be aware of probable inherent susceptibility of some patient to pulmonary fibrosis from cigarette smoking.
Radiographic features
CT
The presence of characteristic imaging features in the correct clinical context is very suggestive of the diagnosis. HRCT would typically show:
-
centrilobular and/or paraseptal emphysema:
- often upper zone predominant 5
- the emphysema component may have a tendency to be more paraseptal 9
- pulmonary fibrosis of the lower lobes: can be of UIP or NSIP pattern
Three distinct patterns have been described in recent literature 6:
- progressive transition with diffuse emphysema (centrilobular and/or bullous) and zone of transition between bullae and honeycombing
- paraseptal emphysema with predominant subpleural bullae of enlarging size at the bases
- separate processes with independent areas of fibrosis and emphysema
Treatment and prognosis
Complications
The risk of the development of pulmonary hypertension is considered to be notably higher in those patients with CPFE than in those with idiopathic pulmonary fibrosis without emphysema 1,2.
Patients may have a higher risk of developing lung cancer 11. Lung cancer occurring on those with CPFE may have a poorer prognosis and according to one study, the commonest type has been squamous cell lung cancer 10.
See also
-<p><strong>Combined pulmonary fibrosis and emphysema (CPFE)</strong> is a possible new addition to a growing list of <a href="/articles/smoking-related-lung-disease-1">smoking-related lung disease</a> characterised by the coexistence of <a href="/articles/usual-interstitial-pneumonia">usual interstitial pneumonia</a> (UIP) or <a href="/articles/non-specific-interstitial-pneumonia-1">nonspecific interstitial pneumonia</a> (NSIP) with <a href="/articles/pulmonary-emphysema">emphysema</a> in smokers.</p><h4>Epidemiology</h4><p>It typically occurs in male smokers <sup>3</sup>. It is estimated to represent between 5-10% of cases of <a href="/articles/interstitial-lung-disease">diffuse interstitial lung disease</a>.</p><h4>Clinical presentation</h4><p> Clinical features include:</p><ul>-<li>tobacco smoking</li>- +<p><strong>Combined pulmonary fibrosis and emphysema (CPFE)</strong> is a possible new addition to a growing list of <a href="/articles/smoking-related-lung-disease-1">smoking-related lung disease</a> characterised by the coexistence of <a title="Usual interstitial pneumonia (UIP)" href="/articles/usual-interstitial-pneumonia">usual interstitial pneumonia (UIP)</a> or <a title="Non-specific interstitial pneumonia" href="/articles/non-specific-interstitial-pneumonia-1">nonspecific interstitial pneumonia (NSIP) </a>with <a href="/articles/pulmonary-emphysema">emphysema</a> in <a title="Tobacco smoking" href="/articles/tobacco-abuse">tobacco smokers</a>.</p><h4>Epidemiology</h4><p>It typically occurs in male smokers <sup>3</sup>. It is estimated to represent between 5-10% of cases of <a href="/articles/interstitial-lung-disease">diffuse interstitial lung disease</a>.</p><h4>Clinical presentation</h4><p> Clinical features include:</p><ul>
- +<li><a title="Tobacco smoking" href="/articles/tobacco-abuse">tobacco smoking</a></li>
- +<li><a title="Tobacco smoking" href="/articles/tobacco-abuse">tobacco smoking</a></li>