Reply to 'Letter to the Editor: "Asbestosis Requiring Lung Transplantation in a Retired Hairdresser: An Occupational Exposure to Comb Through"'

Our plain-English summary of Reply to 'Letter to the Editor: "Asbestosis Requiring Lung Transplantation in a Retired Hairdresser: An Occupational Exposure to Comb Through"', by R. Bu, L. Puttagunta, A. Hirji (Respirology Case Reports, 2025).

The study

• Authors: R. Bu, L. Puttagunta, A. Hirji
• Journal: Respirology Case Reports
• Published: 2025;13(10):e70370
• Type of article: Letter, Comment
• Read it: PubMed · Publisher · Free full text

In plain English

This is a reply letter, not a new study. The authors of an earlier case report on a retired hairdresser who needed a lung transplant for asbestosis answered a letter criticising that report. The authors agreed case reports generate hypotheses and cannot establish cause. They did not mean to classify hairdressers as a high-risk group. They acknowledged that airborne asbestos levels measured from hairdryers fall well below levels linked to disease. They agreed the correct threshold is 25 to 100 fibre/mL-years, not the 25,100 fibres/cc per year their report stated, and said they would have this corrected. They argued that laboratory tests may underestimate real conditions: the patient worked in a small, poorly ventilated salon where several hairdryers ran at once, and used one for over a decade. The removed lungs showed multiple asbestos bodies and fibrosis. Fibre counting and typing were not done, and the tissue has since been discarded. The authors considered talc an unlikely contributor. The authors concluded that caution is needed in attributing the disease to the patient's occupation, because unrecognised asbestos exposures may have contributed.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Reply letter (correspondence) from the authors of an earlier case report, responding to a letter to the editor about that report; no new data
• Who was studied: One patient described in the authors' earlier case report: a retired hairdresser with asbestosis who required lung transplantation and who had worked in a small, poorly ventilated salon
• Exposure: Possible asbestos release from hairdryers, which the patient used consistently for over a decade, with several hairdryers operating at once. Cosmetic talc was also discussed. No fibre type is given.
• Main results:
  • The authors acknowledged that airborne asbestos exposures from hairdryers, as reported in structures per cubic centimetre, fall well below the levels associated with clinical disease
  • The authors agreed with the letter writers that the clinical exposure threshold is 25 to 100 fibre/mL-years, not the 25,100 fibres/cc per year stated in the original report, and said they will ensure this is corrected
  • Histopathology of the patient's explanted lungs showed multiple asbestos bodies and lower lobe-predominant diffuse interstitial fibrosis, which the authors said strongly supports a diagnosis of asbestosis
  • The patient had bilateral calcified pleural plaques, which the authors described as relevant
  • The authors judged that talc was an unlikely contributor, because asbestosis generally requires higher chronic exposures than mesothelioma
• The authors' conclusion: The authors said this is the first reported case of asbestosis in a hairdresser and urged caution in attributing the disease to the patient's occupational exposures, since unrecognised asbestos exposures may have contributed. They said the case shows the importance of taking a full occupational history in fibrotic lung disease of unclear cause.
• Limitations the authors state:
  • Case reports are not designed to establish causality
  • Fibre quantification and typing were not available in the authors' lab, and the remaining explant tissue has been disposed of
  • The authors could not distinguish between exposures (such as talc and hairdryers) by history or pathology
  • Unrecognised asbestos exposures may have contributed to the patient's disease

Topics

Medical terms in this study, explained in our Lexicon: Lung Transplant, Occupational Exposure.

Related studies

• Letter to the Editor: 'Asbestosis Requiring Lung Transplantation in a Retired Hairdresser: An Occupational Exposure to Comb Through' — E. Anderson, S. Meyler, et al. (2025)
• Asbestosis Requiring Lung Transplantation in a Retired Hairdresser: An Occupational Exposure to Comb Through — R. Bu, L. Puttagunta, et al. (2025)
• Reply to letters to the editor by Brentisci et al. and Consonni and Mensi — P. Boffetta, L. Righi, et al. (2019)
• Reply to the editor — M. Baud, P. Forgez, et al. (2013)
• Reply to the editor — W.T. Vigneswaran (2014)
• Letter to the editor on commentary: malignant mesothelioma incidence among talc miners and millers in New York state by M M Finkelstein — R.P. Nolan, J.F. Gamble, et al. (2013)

Browse more research in Respirology Case Reports, or return to medical research.