An unusual cause of an anterior mediastinal mass

Our plain-English summary of An unusual cause of an anterior mediastinal mass, by I. Hassan, A. Goolam-Mahomed (Respiratory Medicine Case Reports, 2014).

The study

• Authors: I. Hassan, A. Goolam-Mahomed
• Journal: Respiratory Medicine Case Reports
• Published: 2014;12:52-4
• Cited by: 5 articles, as counted by NIH iCite
• Read it: PubMed · Publisher · Free full text

Abstract

Mesothelioma is a rare tumour and its radiological growth pattern varies. We report the case of a biopsy proven Malignant Pleural Mesothelioma (MPM) presenting as an anterior mediastinal mass in a platinum miner. The prognosis for this aggressive tumour remains poor, despite combination treatment modalities.

In plain English

This was a case report about one patient, written by doctors at a hospital in South Africa. A 56-year-old male non-smoker with more than 25 years of work in platinum mining sought care for unrelenting chest pain and worsening breathlessness. He had clubbing of the fingers, which the authors called uncommon in this disease, and breathing tests showed a mild obstructive pattern. Fluid washed from his airways during bronchoscopy contained an iron-coated (ferruginised) asbestos body. The article did not name the asbestos fiber type or say where the exposure came from. After a chest CT scan, a needle biopsy of a mass in the front of the chest (anterior mediastinum) stained positive for mesothelial markers, and malignant pleural mesothelioma was diagnosed. He received palliative chemotherapy and pain medicines and died a year later. The authors described this location and presentation as atypical. They concluded that CT is poor at diagnosing this form of the disease and that a certain diagnosis must be made by biopsy. They also noted that evidence is lacking for any link between platinum mining and mesothelioma.

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 56-year-old male non-smoker with more than 25 years of occupational history of platinum mining, seen by authors at Dr George Mukhari Academic Hospital, South Africa; dates not given
• Exposure: More than 25 years of platinum mining; an asbestos body was found in bronchial lavage fluid, but no fiber type, product or source of asbestos exposure was identified
• Main results:
  • Bronchial lavage during bronchoscopy yielded a ferruginised asbestos body
  • The patient had clubbing of the digits, described by the authors as uncommon in MPM
  • Spirometry (flow volume loop) showed a mild obstructive pattern
  • Diagnosis was made by ultrasound-guided core biopsy of the mediastinal mass, which stained positive for calretinin, AE1/AE3 cytokeratin and epithelial membrane antigen
  • He was treated with palliative chemotherapy, opioid painkillers and carbamazepine for nerve pain, and died of the disease a year later
  • A chest X-ray a year later showed extensive bilateral lung involvement suggesting miliary spread
• The authors' conclusion: The authors concluded that MPM presenting as an anterior mediastinal mass is atypical, that CT has poor sensitivity and specificity for mediastinal-side MPM, and that a certain diagnosis can and must only be made by biopsy
• Limitations the authors state:
  • The authors stated that evidence is lacking for any relation between platinum mining and the development of mesothelioma
  • The authors stated that the clinical significance of the obstructive breathing pattern in this patient is uncertain

Topics

Medical terms in this study, explained in our Lexicon: Mesothelioma, Biopsy, Pleural Mesothelioma, Prognosis.

Related studies

• An unusual isolated anterior mediastinal lesion — N. Quigley, L. Lang-Lazdunski, et al. (2022)
• Localized malignant pleural mesothelioma mimicking an anterior mediastinal tumor — T. Hino, T. Kamitani, et al. (2019)
• Minimally invasive, ionizing-free, and ultrasound-guided technique to biopsy anterior mediastinal masses: first 60 cases — B. Lorenzati, R. Cristofori, et al. (2018)
• Rosai-Dorfman disease presenting as a solitary mediastinal mass — A.I. Hida, S. Yagi, et al. (2009)
• Diagnosis and treatment of pericardial mesothelioma by mediastinal mass resection: a case report — L. Liang, X. Zhang, et al. (2022)
• An unusual liver mass: primary malignant mesothelioma of the liver : CT and MRI findings and literature review — A. Serter, N. Buyukpinarbasili, et al. (2015)

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