Small Airway-Centered Granulomatosis Caused by Long-term Exposure to Polytetrafluoroethylene

Title
Small Airway-Centered Granulomatosis Caused by Long-term Exposure to Polytetrafluoroethylene
Authors
Won-Il ChoiHye Ra JungEsmeralda ShehuByung Hak RhoMi-Young LeeKun Young Kwon
Keimyung Author(s)
최원일; 노병학; 이미영; 정혜라; 권건영
Department
Dept. of Internal Medicine (내과학); Dept. of Radiology (영상의학); Dept. of Preventive Medicine (예방의학); Dept. of Pathology (병리학)
Issue Date
2014
Publisher
School of Medicine
Citation
Chest, Vol.145(6) : 1397-1402, 2014
Abstract
To date, there have been no reports of chronic pulmonary granulomatosis associated with exposure to polytetrafluoroethylene (PTFE). Here, we report three cases of small airway-centered granulomatous lesions in workers employed at facilities that apply coatings to pans and other utensils. The workers were repeatedly exposed to PTFE particles that were probably generated by the drying process when PTFE coatings are dried in a convection oven at high temperatures (380-420°C). The duration of inhalational PTFE exposure was between 7 and 20 years. We found granulomatous lung lesions around the small airways in lung biopsy specimens obtained from the workers. Scanning electron microscopy/energy-dispersive x-ray spectroscopy analysis was performed focusing on areas where the PTFE particles were suspected to be located in macrophages. The scanning electron microscopy/energy-dispersive x-ray spectroscopy analyses revealed fluorine in the particles. Lung tissue samples from all cases were analyzed using a fully automated Fourier transform infrared spectrometer. Analysis of the spectrum extracted from the position of the foreign particles enabled precise identification of the foreign bodies as PTFE. Fourier transform infrared revealed that all of the lung tissue samples had bands at 1, 202 to 1, 148 cm−1 and 1, 202 to 1, 146 cm−1, which are characteristic of the asymmetric and symmetric stretching vibrations of the C-F bonds of PTFE. These cases suggest that recurrent inhalational exposure to PTFE particles causes chronic pulmonary granulomatosis.
URI
http://kumel.medlib.dsmc.or.kr/handle/2015.oak/17062
ISSN
0012-3692
Appears in Collections:
1. 연구논문 > 1. School of Medicine (의과대학) > Dept. of Radiology (영상의학)
1. 연구논문 > 1. School of Medicine (의과대학) > Dept. of Preventive Medicine (예방의학)
1. 연구논문 > 1. School of Medicine (의과대학) > Dept. of Pathology (병리학)
1. 연구논문 > 1. School of Medicine (의과대학) > Dept. of Internal Medicine (내과학)
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