Beryllium detection in human lung tissue using electron probe X-ray microanalysis

Our plain-English summary of Beryllium detection in human lung tissue using electron probe X-ray microanalysis, by K.J. Butnor, T.A. Sporn, P. Ingram, et al (Modern Pathology, 2003).

The study

• Authors: K.J. Butnor, T.A. Sporn, P. Ingram, S. Gunasegaram, J.F. Pinto, V.L. Roggli
• Journal: Modern Pathology
• Published: 2003;16(11):1171-7
• Type of article: Case report
• Cited by: 10 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

Chronic berylliosis is an uncommon disease that is caused by the inhalation of beryllium particles, dust, or fumes. The distinction between chronic berylliosis and sarcoidosis can be difficult both clinically and histologically, as both entities can have similar presentations and exhibit nonnecrotizing granulomatous inflammation of the lungs. The diagnosis of chronic berylliosis relies on a history of exposure to beryllium, roentgenographic evidence of diffuse nodular disease, and demonstration of beryllium hypersensitivity by ancillary studies, such as lymphocyte proliferation testing. Additional support may be gained by the demonstration of beryllium in lung tissue. Unlike other exogenous particulates, such as asbestos, detection of beryllium in human lung tissue is problematic. The low atomic number of beryllium usually makes it unsuitable for conventional microprobe analysis. We describe a case of chronic berylliosis in which beryllium was detected in lung tissue using atmospheric thin-window energy-dispersive X-ray analysis (ATW EDXA). A woman with a history of occupational exposure to beryllium at a nuclear weapons testing facility presented with progressive cough and dyspnea and a nodular pattern on chest roentgenograph. Open lung biopsy showed nonnecrotizing granulomatous inflammation that was histologically indistinguishable from sarcoidosis. Scanning electron microscopy and ATW EDXA demonstrated particulates containing beryllium within the granulomas. This application of EDXA offers significant advantages over existing methods of beryllium detection in that it is nondestructive, more widely available, and can be performed using routine paraffin sections.

In plain English

This article is a case report about beryllium, not asbestos. Asbestos is mentioned only in passing, as a particle that is easier to detect in lung tissue. The authors described a 40-year-old woman, a nonsmoker, who was exposed to beryllium while working as a geologist at a nuclear weapons testing facility. She developed a persistent cough and shortness of breath, with a diffuse nodular pattern on chest X-rays. A lung biopsy showed nonnecrotizing granulomas, findings that the authors noted do not readily allow distinction from sarcoidosis. Using scanning electron microscopy and atmospheric thin-window energy-dispersive X-ray analysis, the authors found a few small particles inside giant cells of the granulomas, and these gave peaks for beryllium. Lung tissue without particles gave no or trace beryllium peaks. A lymphocyte proliferation test for beryllium was positive. A comparison sample, from a sarcoidosis-like case with no beryllium exposure history, showed no beryllium peaks. The authors concluded that the method was technically feasible on routine paraffin sections. They said further investigation is needed to determine its sensitivity and specificity.

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: case report (single patient), with lung tissue from one sarcoidosis-like case without beryllium exposure analyzed as a control
• Who was studied: one 40-year-old Caucasian female nonsmoker with persistent cough, dyspnea and diffuse nodular lung disease on chest radiographs; clinical impression before biopsy was sarcoidosis
• Exposure: occupational beryllium exposure through work as a geologist at a nuclear weapons testing facility; no exposure levels given; no asbestos exposure studied
• Main results:
  • In the patient, the lung biopsy showed clusters of well-formed nonnecrotizing granulomas with multinucleated giant cells, mainly along bronchovascular bundles
  • The authors stated that the clinical and histologic findings in this case did not readily allow distinction from sarcoidosis
  • In the patient's lung tissue, electron imaging showed a few bright, round to irregular particles about 0.5 to 3 micrometres in size (unit symbol lost in the text) in the cytoplasm of giant cells; such particles were not apparent in surrounding nongranulomatous tissue
  • In the patient's lung tissue, X-ray analysis of the particles gave discrete beryllium peaks, while tissue without particles gave no or trace beryllium peaks
  • The patient's lymphocyte proliferation test for beryllium was positive
  • In control lung tissue, from a case of nonnecrotizing granulomatous inflammation with features consistent with sarcoidosis and a negative beryllium exposure history, no such particles and no beryllium peaks were found
• The authors' conclusion: The authors concluded that atmospheric thin-window energy-dispersive X-ray analysis is a technically feasible tool for detecting beryllium in human lung tissue, with the advantage of using routine paraffin sections
• Limitations the authors state:
  • The authors stated that further investigation is needed to determine the method's overall sensitivity and specificity before it can be used in diagnosis
  • The authors noted that, because of background environmental beryllium, tissue from people with no known exposure may show low levels of beryllium

Topics

Medical terms in this study, explained in our Lexicon: Inflammation, Occupational Exposure, Dyspnea, Biopsy, Scanning Electron Microscopy (SEM), Granuloma.

Related studies

• Oxygen incineration and electron microscope x-ray microanalysis of mineral particles in biological tissues — W.J. Henderson, C. Melville-Jones, et al. (1978)
• Elemental analysis of asbestos fibers by means of electron probe techniques — I.A. Rubin, C.J. Maggiore (1974)
• Scanning electron microscopy and x-ray microanalysis of mineral deposits in lungs of a patient with pleural mesothelioma — E.M. Ophus, G. Mowé, et al. (1980)
• Pulmonary mineral dust. A study of ninety patients by electron microscopy, electron microanalysis, and electron microdiffraction — J.P. Berry, P. Henoc, et al. (1976)
• Electron microscopy analysis of mineral fibers in human lung tissue — K.H. Friedrichs, M. Brockmann, et al. (1992)
• A primary mesothelioma involving the rectovaginal septum and associated with beryllium — C. Gold (1967)

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