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Journal Article
Research Support, Non-U.S. Gov't
Profusion of fibroblast foci in patients with idiopathic pulmonary fibrosis does not predict outcome.
Respiratory Medicine 2008 June
RATIONALE: The prognostic significance of fibroblast foci in surgical lung biopsies from patients with idiopathic pulmonary fibrosis (IPF) is unclear.
OBJECTIVES: We assessed the relationship between profusion of fibroblast foci and survival in 43 patients with IPF seen at a tertiary referral medical center from 1996 to 2002.
METHODS: Fibroblast foci in surgical lung biopsies were counted using a systematic morphometric point-counting technique. Patients with either clinical or pathologic evidence of accelerated disease were excluded from analysis. The association of fibroblast counts with survival was assessed using proportional hazards regression.
RESULTS: The mean age (+/-SD) of the study population was 64+/-9 years; 26 (60%) patients were male. The mean (%+/-SD) profusion of fibroblastic foci was 0.6+/-0.7, expressed as a percentage of total points counted. Fibroblast foci counts did not differ markedly between upper, middle, and lower lobes. Median survival from the time of biopsy was 2.4 years; there were 25 (58%) deaths in the follow up period. There was no significant relationship between profusion of fibroblast foci and survival in the overall group (p=0.250).
CONCLUSIONS: Higher prevalence of fibroblast foci assessed using a simple point-counting technique applied to surgical lung biopsies is not associated with survival in patients with clinically stable IPF.
OBJECTIVES: We assessed the relationship between profusion of fibroblast foci and survival in 43 patients with IPF seen at a tertiary referral medical center from 1996 to 2002.
METHODS: Fibroblast foci in surgical lung biopsies were counted using a systematic morphometric point-counting technique. Patients with either clinical or pathologic evidence of accelerated disease were excluded from analysis. The association of fibroblast counts with survival was assessed using proportional hazards regression.
RESULTS: The mean age (+/-SD) of the study population was 64+/-9 years; 26 (60%) patients were male. The mean (%+/-SD) profusion of fibroblastic foci was 0.6+/-0.7, expressed as a percentage of total points counted. Fibroblast foci counts did not differ markedly between upper, middle, and lower lobes. Median survival from the time of biopsy was 2.4 years; there were 25 (58%) deaths in the follow up period. There was no significant relationship between profusion of fibroblast foci and survival in the overall group (p=0.250).
CONCLUSIONS: Higher prevalence of fibroblast foci assessed using a simple point-counting technique applied to surgical lung biopsies is not associated with survival in patients with clinically stable IPF.
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