A Case Report: Malignant Mesothelioma with Unexpected Contralateral Mediastinal Shift
Case Introduction: An unusual clinical feature of mesothelioma is the presentation of contralateral mediastinal shift due to pleural mesothelioma tissue, rather than a pleural effusion.
Case Summary: A woman, 63 years of age, who had been treated in the past for invasive ductal carcinoma of the breast, presented with chest pain and breathlessness. A radiograph of the chest revealed that she had contralateral mediastinal shift. Her symptoms were relieved after drainage of over 3 litres of pleural fluid.
Further investigations that she underwent revealed pleural mesothelioma cancer rather than metastatic breast cancer which was expected. A few months later she again re-presented with breathlessness and a contralateral mediastinal shift was also again demonstrated in a chest radiograph.
On this occasion, a thoracic ultrasound revealed only a small loculated pleural effusion and, surprisingly, a large amount of malignant tissue which explained what was appearing in the chest radiographs.
Case Conclusion: This case illustrates that the mesothelioma tissue itself caused the mediastinal shift away from the affected side, not a pleural effusion which usually causes contralateral mediastinal shift in malignant mesothelioma cases.
Author: James S Myerson, Mary ER O'Brien and Shibani Nicum
Credits/Source: Journal of Medical Case Reports 2008, 2:125
Source
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