Traumatic implantation: a novel aetiology in the development of peritoneal mesothelioma

Our plain-English summary of Traumatic implantation: a novel aetiology in the development of peritoneal mesothelioma, by N. Humphrys, A. Downing, L. Evans, et al (Case Reports in Emergency Medicine, 2013).

The study

• Authors: N. Humphrys, A. Downing, L. Evans, M. Sinclair
• Journal: Case Reports in Emergency Medicine
• Published: 2013;2013:389130
• Read it: PubMed · Publisher · Free full text

Abstract

Peritoneal mesothelioma is a rare intra-abdominal malignancy. Its aetiology has been thought to be due to either inhalation or ingestion of asbestos particles. We present a case of peritoneal mesothelioma developing as a result of a novel third route and the inoculation of fibres into the peritoneal cavity by penetrating trauma and direct transport. This case report highlights the important long term consequences of penetrating abdominal trauma and the need for vigilance in undertaking peritoneal toilet.

In plain English

This article is a case report about one patient in the UK. A 68-year-old man came to a surgical clinic with worsening indigestion, poor appetite and slight weight loss. More than 20 years earlier, as a roofer, he had fallen from a height onto a garden parasol spike, which entered through the perineum. Discharged after 48 hours, he returned two weeks later with peritonitis. Surgery found an abscess in the right upper abdomen containing pieces of clothing. Twenty years later, a soft tissue mass was found in the same area. A biopsy pointed to malignant mesothelioma as most likely. The mass was removed with part of the stomach and colon; analysis of it then confirmed the diagnosis, and no further treatment was given. He was alive at 19 months of follow-up but had recurrent disease in the abdomen. He showed no pleural disease. The authors concluded that the peritoneal mesothelioma arose from fibres carried into the abdomen by the penetrating injury. They reasoned that his 1980s roofing work almost certainly involved some asbestos exposure. The article does not report testing his tissue or clothing for fibres.

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)
• Who was studied: One 68-year-old man seen at a surgical outpatient department in the UK, who had earlier worked as a roofer
• Exposure: Penetrating abdominal injury from a fall onto a garden parasol spike while working as a roofer, with pieces of clothing later found inside the abdomen. The authors infer, without reported fibre testing, that his roofing work in the 1980s involved some asbestos exposure. No fibre type is named.
• Main results:
  • After the injury he was observed for 48 hours with no signs of illness and discharged. He came back two weeks later with peritonitis.
  • At the laparotomy after the injury, an abscess cavity containing pieces of clothing was found in the right upper quadrant. No gastrointestinal organs were breached.
  • About 20 years later, a soft tissue mass was found in the right upper quadrant.
  • A biopsy, read together with the history and clinical findings, gave malignant mesothelioma as the most likely diagnosis.
  • The mass was removed en bloc together with the distal stomach and the right and transverse colon.
  • Postoperative histology of the removed specimen confirmed malignant mesothelioma.
  • After discussion with a national peritoneal malignancy centre, the decision was made to give no further treatment.
  • The patient was alive at 19 months of follow-up but had recurrent disease in the abdomen.
  • The patient had no evidence of pleural disease at presentation or afterwards. The authors took this to make inhalation or ingestion of fibres an unlikely route.
• The authors' conclusion: The authors concluded that this peritoneal mesothelioma developed by a novel third route: fibres were inoculated into the peritoneal cavity by penetrating trauma and direct transport.

Topics

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

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