Mesothelioma Micronodular Metastasis Pattern Confirmed by Transbronchial Cryobiopsy: Case Report

Our plain-English summary of Mesothelioma Micronodular Metastasis Pattern Confirmed by Transbronchial Cryobiopsy: Case Report, by J.W. Kerkhoff, W. Vreuls, L.C. Vermeer (Clinical Lung Cancer, 2021).

The study

• Authors: J.W. Kerkhoff, W. Vreuls, L.C. Vermeer
• Journal: Clinical Lung Cancer
• Published: 2021;22(4):e533-e535
• Type of article: Case report
• Read it: PubMed · Publisher

In plain English

This case report, from a hospital in Nijmegen, the Netherlands, describes one patient. The 77-year-old patient had worked in the construction industry. The report does not describe any specific asbestos exposure. The patient sought care for breathlessness caused by a large amount of fluid around the right lung. Only superficial pleural biopsies had been taken, so the diagnosis was uncertain. An expert panel diagnosed malignant mesothelioma of the epithelioid type. After first-line palliative chemotherapy, a CT scan showed shrinking chest lymph nodes but growing pleural thickening on the right, and many tiny nodules in both lungs (a micronodular miliary pattern). A transbronchial cryobiopsy is a lung biopsy taken through the airways using freezing. It showed that the nodules were spread of the mesothelioma, including inside lymph vessels. The patient chose supportive care aimed at symptoms. The authors concluded that this pattern of spread is rare for mesothelioma and that cryobiopsy can be useful for obtaining tissue in well-selected cases. They noted that more research comparing it with surgical biopsy is needed.

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 (one patient)
• Who was studied: One 77-year-old patient with a history of employment in the construction industry, seen at the pulmonary department of Canisius-Wilhelmina Hospital, Nijmegen, the Netherlands; no dates of care given
• Exposure: The report gives only a history of employment in the construction industry; it does not describe asbestos exposure, fiber types or doses for this patient
• Main results:
  • At presentation, a CT scan showed mediastinal lymphadenopathy and pleural thickening, with no parenchymal metastases
  • Because only superficial pleural biopsies were available, an expert panel was consulted and diagnosed malignant mesothelioma of the epithelioid type
  • After first-line palliative chemotherapy, a CT scan showed regression of the lymphadenopathy but progression of right-sided pleural thickening and a bilateral micronodular miliary pattern
  • Transbronchial cryobiopsy showed numerous intravascular (lymph vessel) and parenchymal nodules that were metastatic foci of malignant mesothelioma
  • The patient chose best supportive care with symptom-oriented palliation
• The authors' conclusion: The authors concluded that pulmonary miliary nodular metastasis is a rare pattern for mesothelioma and that transbronchial cryobiopsy can be a useful way to obtain tissue samples in well-selected cases
• Limitations the authors state:
  • Because the initial pleural biopsies were superficial, distinguishing reactive mesothelial proliferation from malignant mesothelioma was not certain
  • More research is needed to compare cryobiopsy with surgical biopsy (the standard of care) on diagnostic yield and complication risk

Topics

The National Library of Medicine indexes this study under subjects our site covers: Lung cancer, Mesothelioma.

Medical terms in this study, explained in our Lexicon: Mesothelioma, Metastasis.

Related studies

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• Comparison of light and electron microscopy for defining occupational asbestos exposure in transbronchial lung biopsies — R.F. Dodson, G.A. Hurst, et al. (1988)
• Metastasis of malignant peritoneal epithelioid mesothelioma in endoscopic gastric biopsy: a diagnostic pitfall — L. Daniele, A. Righi, et al. (2011)
• Cryobiopsy during flex-rigid pleuroscopy: an emerging alternative biopsy method in malignant pleural mesothelioma. A comparative study of pathology — T. Nakai, Y. Matsumoto, et al. (2019)
• Use of cryobiopsy during pleuroscopy for diagnosis of sarcomatoid malignant mesothelioma — H.P. Chan, M.F. Liew, et al. (2017)
• Flow cytometric analysis of ploidy in immunohistochemically confirmed examples of malignant epithelial mesothelioma — H.F. Frierson, S.E. Mills, et al. (1988)

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