Patient with FVC>90% predicted

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Presentation transcript:

Patient with FVC>90% predicted Case 2 | Demosthenes Bouros, Vasilios Tzilas | University of Athens

CASE OVERVIEW A 63-year-old, male patient with progressive exertional dyspnoea lasting for 2 years and dry cough showed a mild reduction of DLCO at initial lung function testing. An initial HRCT revealed a possible UIP pattern including reticular abnormalities and traction bronchiectasis. Functional follow-up testing showed preserved FVC despite progressive reduction in DLCO. This is a case that shows that preserved lung volumes do not exclude IPF even in the absence of emphysema. Also, DLCO deterioration seems to correlate better with progression of fibrosis on HRCT.

MEDICAL HISTORY AND TESTS Basic data Male, 63 years old Symptoms: progressive dyspnoea on exertion during the last 2 years, dry cough Smoking status: never smoker Occupation: banker (office worker), no exposure allergens, irritants No comorbidities

MEDICAL HISTORY AND TESTS Physical examination Lung auscultation: Velcro-like crackles with basal predominance No digital clubbing No leg oedema No arthralgia SpO2: 97% (on ambient air) Heart rate: 80 bpm Cardiology evaluation RVSP: 30 mmHg

LABORATORY Normal CBC, biochemistry ANA: 1/160 RF, anti-CCP, ENA panel: negative

LUNG FUNCTION Initial tests Conclusion: Mild reduction of DLCO Borderline reduction in TLC Parameter Value FVC 97% predicted FEV1/FVC 89% TLC 80% predicted DLCO 71% predicted

HRCT Image stack will be inserted as a video (Folder: Case 2-HRCT Initial) IMAGING Initial HRCT Irregular reticular pattern with subpleural distribution and lower zone predominance Traction bronchiectasis/bronchiolectasis No inconsistent features with a UIP pattern Conclusion: Possible UIP pattern Slice thickness: 1.0 mm HRCT, high resolution CT

Which of the following is true? QUESTION 1 Which of the following is true? Treatment with nintedanib could be indicated Treatment with pirfenidone could be indicated No treatment is indicated because of relatively preserved lung volumes (FVC: 97% predicted, TLC: 80% predicted)* No treatment is indicated because there is no definite honeycombing on HRCT and because there is no biopsy confirmed diagnosis* Correct answer: A, B

ANSWER 1 Author’s solution A post hoc subgroup analysis of the INPULSIS® clinical trial showed same effect of nintedanib on annual rate of decline in FVC, time to first acute exacerbation and change in SGRQ total score over 52 weeks in patients with preserved/marginally impaired lung function (FVC >90% predicted) vs patients with more impaired lung function (FVC< 90% predicted) and also in patients without honeycombing or biopsy vs patients with honeycombing and/or biopsy. The annual rate of decline in FVC in the placebo groups was similar in patients with marginally impaired lung function and in patients with more advanced lung function impairment. These findings suggest that 1. patients with marginally impaired FVC (>90% predicted) benefit from treatment with nintedanib and 2. presence or absence of honeycombing and/or biopsy did not have an effect on the treatment outcome. 1,2 Pooled data from the ASCEND and CAPACITY clinical trials showed similar treatment effects of pirfenidone on rate of decline in FVC and 6MWD, in patients with baseline FVC ≥ 80% and GAP1 vs patients with baseline FVC < 80% or GAP2-3.3 Based on these findings, the official IPF treatment guideline update from 2015 included a conditional recommendation for the use of pirfenidone and nintedanib.4 Kolb M et al. Am J Respir Crit Care Med 191;2015:A1021. Raghu G et al. Am J Respir Crit Care Med 191;2015:A1022. Albera C et al. Am J Respir Crit Care Med 191;2015:A1018. Raghu g et al. Am J Respir Crit Care Med 192;2015:e3–e19.

OUTPATIENT CLINIC The patient was unwilling to start therapy with anti-fibrotic agents. He reported back to our centre after 22 months due to further worsening of his dyspnoea. New physical, laboratory and cardiology evaluation did not disclose any new findings. In the meanwhile, the patient was monitored by a private respiratory physician and was subjected to serial pulmonary function tests.

Follow-up 13 months later LUNG FUNCTION Follow-up 13 months later Date FVC (% pred) FEV1/FVC (%) TLC (% pred) DLCO (% pred) Baseline 97 89 80 71 After 4 months 92 91 72 61 After 8 months 79 78 51 After 12 months 86 70 52 After 18 months 90 - 46  Progressive reduction in DLCO is noted, with preserved FVC

What is considered a bad prognosticator in the outcome of IPF? QUESTION 2 What is considered a bad prognosticator in the outcome of IPF? A baseline DLCO<35% A decrease in DLCO> 15% in 6 months A decrease in FVC> 5% in 6 months All of the above* None of the above Correct answer: D

ANSWER 2 Author’s solution DlCO trends are strongly predictive of survival when dichotomised as a significant (more than 15% of baseline) decline or stability/improvement.1 A decline in percent-predicted FVC ≥10% at 24 weeks is associated with a nearly five-fold increase in the risk of mortality over the subsequent year, whereas a decline of 5–10% is associated with a two-fold increase in the risk of 1-year mortality.2 Latsi PI, du Bois RM, Nicholson AG et al. Am J Respir Crit Care Med 2003;168:531–7. Du Bois RM et al. Am J Respir Crit Care Med 2011;184(12):1382-1389.

The follow-up HRCT Image stack will be inserted as a video (Folder: Case 2-HRCT-Follow-up) IMAGING 1 2 HRCT 3 Initial HRCT (upper row: level of bronchus intermedius, lower row: level of RB6) Follow-up HRCT 13 months later (upper row: level of bronchus intermedius, lower row: level of RB6)

The extent of fibrosis on the follow up HRCT is: QUESTION 3 The extent of fibrosis on the follow up HRCT is: Stable Increased* Decreased Correct answer: B

ANSWER 3 Author’s solution The observed irregular reticular pattern has increased in extent as well as in density. Also, new areas of traction bronchiectasis are noted.

EXPERT OPINION It is indeed difficult for some patients (particularly in early stages when symptoms are mild and self-manageable) to accept the necessity of a chronic treatment. However, IPF is a relentlessly progressive disease. There are encouraging data regarding the efficacy of both pirfenidone and nintedanib in IPF patients with preserved lung volumes (FVC>80% pred. at baseline and FVC >90% pred. at baseline, respectively).1-3 This actually coincides with common sense. It is reasonable that early intervention preserves more functional lung parenchyma. In addition to this, data with nintedanib have shown to reduce the risk of an acute exacerbation occurring in a fibrotic lung.4 For further reading: Kolb M et al. Am J Respir Crit Care Med 191;2015:A1021. Raghu G et al. Am J Respir Crit Care Med 191;2015:A1022. Albera C et al. Am J Respir Crit Care Med 191;2015:A1018. Richeldi et al. N Eng J Med 370;2014.2071-82.

LEARNINGS FROM THE CASE Preserved lung volumes do not exclude IPF even in the absence of emphysema. Current data support the initiation of antifibrotic treatment in IPF patients with preserved lung volumes (FVC>80%). Despite the preserved FVC, DLCO deterioration seems to correlate better with progression of fibrosis on HRCT.1,2 Wells AU et al. Am J Respir Crit Care Med. 1997;155:1367-1375. Park KH et al. Eur J Cardiothorac Surg. 2007;31:1115-1119.