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Metastatic pleural mesothelioma presenting with solitary involvement of the tongue: report of a new case and review of the literature
Authors:Zanconati Fabrizio  DelConte Alessandro  Bonifacio-Gori Daniela  Falconieri Giovanni
Affiliation:Department of Anatomic Pathology, University of Trieste School of Medicine, General Hospital S. Maria della Misericordia, Udine, Italy.
Abstract:We report a new case of mesothelioma that presented with an isolated lingual metastasis 14 months after initial diagnosis. The patient was a 71-year-old man with a history of pleural decortication and chemotherapy for epithelioid mesothelioma who recently complained of chronic bleeding from a nodular consolidation of tongue. There was no clinical or instrumental evidence of extrathoracic tumor spread. Microscopic examination of a lingual biopsy specimen revealed nests of atypical polygonal cells with moderate cytoplasm, immunopositive for keratins, epithelial membrane antigen, vimentin, thrombomodulin, and calretinin. This case provides additional evidence that mesothelioma could rarely, but not exceptionally, metastatize, to unusual sites such as the tongue. In that location it can mimic primary poorly differentiated squamous carcinoma or adenocarcinoma as well as a number of other metastatic malignancies. In addition to obvious medicolegal implication, metastatic mesothelioma should be correctly recognized so as to avoid useless radical treatment.
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