Demonstration of pleural mesothelioma by gallium scan

Our plain-English summary of Demonstration of pleural mesothelioma by gallium scan, by I.S. Seo, K.G. Joo, J.E. Carter (Clinical Nuclear Medicine, 1980).

The study

• Authors: I.S. Seo, K.G. Joo, J.E. Carter
• Journal: Clinical Nuclear Medicine
• Published: 1980;5(9):407-9
• Type of article: Case report
• Cited by: 5 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

A case of malignant mesothelioma is presented with marked radionuclide accumulation in the periphery of the hemithorax on Ga-67 imaging.

In plain English

This case report, from The Buffalo General Hospital in Buffalo, New York, described one 77-year-old man. Fluid around his right lung contained poorly differentiated cancer cells of unknown origin, and other tests, including a pleural biopsy, were negative. A gallium-67 scan showed increased tracer uptake over the entire right side of the chest, concentrated at the right base and the mediastinum (the central chest). The patient received chemotherapy and radiation. He was readmitted six months later with worsening breathlessness and wasting, and died on the fifth hospital day. Autopsy found tumor in the right pleural cavity invading the right lung, diaphragm and mediastinum. Microscopy confirmed malignant epithelial mesothelioma. The article does not say whether the patient had been exposed to asbestos. Reviewing the published literature, the authors found three patients with malignant mesothelioma, including this one. All three showed diffusely increased gallium uptake in the affected side of the chest, concentrated at its outer edge (periphery). The authors concluded that this pattern assisted in diagnosis and in judging how far the disease had spread. They noted that acute inflammatory lesions can also produce positive scans.

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
• Who was studied: One 77-year-old man, reported from the Department of Nuclear Medicine, The Buffalo General Hospital and State University of New York at Buffalo, New York; dates of care not given
• Exposure: The article does not report whether this patient had any asbestos exposure. What was studied was a gallium-67-citrate scan (3 mCi injected intravenously, scanned 48 hours later).
• Main results:
  • The patient's chest X-ray showed a pleural effusion (fluid) on the right. The fluid contained poorly differentiated malignant cells of unknown origin, and other diagnostic procedures, including pleural biopsy and bronchoscopy, were negative.
  • The patient's gallium scan showed diffusely increased tracer accumulation over the entire right hemithorax, concentrated in the right base and the mediastinum.
  • After chemotherapy and radiation therapy, the patient was readmitted six months after discharge with progressive dyspnea and cachexia and died on the fifth hospital day.
  • At autopsy the tumor had invaded the patient's right lung, right diaphragm and mediastinum. The left pleural cavity held about 3,000 ml of fluid but no tumor nodules.
  • Microscopic examination confirmed malignant epithelial mesothelioma in this patient.
  • In their review of the published literature, the authors found three patients with malignant mesothelioma, including this case. All three showed diffusely increased gallium accumulation in the involved hemithorax, concentrated at the periphery.
• The authors' conclusion: The authors concluded that the characteristic shape and location of the abnormality on the gallium scan assisted in diagnosing the malignant mesothelioma and in determining its extent. They also concluded that gallium imaging together with the chest radiograph may help determine disease extent and guide therapy.
• Limitations the authors state:
  • The authors noted that acute inflammatory lesions, as well as tumors, involving the pleura could produce positive gallium scans.

Topics

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

Medical terms in this study, explained in our Lexicon: Pleural Mesothelioma, Malignant Mesothelioma, Hemithorax.

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