Background: Cutaneous mesothelioma is rare but may occur following local surgical procedures for visceral mesothelioma or as a metastasis. Methods: A patient with pleural mesothelioma, who developed papules within chest wall scars, 14 and 15 months after pleural biopsy and thoracentesis, respectively, is reported. Results: Histopathology showed an epithelioid tumor forming tubulopapillary and glandular structures. The diagnosis of mesothelioma was confirmed with immunohistochemistry. Tumor cells stained characteristically for low-molecular-weight cytokeratins 5/6, calretinin, and vimentin and were negative for mucicarmine, carcinoembryonic antigen, thyroid transcription factor 1, prostate-specific antigen, gross cystic disease fluid protein, S-100, factor VIII, and CD31. Conclusions: Histologically, mesothelioma may resemble a primary adnexal neoplasm, metastatic adenocarcinoma, or angiosarcoma. Immunohistochemistry can clarify the diagnosis. Clinicians should be aware of the varied presentations of mesothelioma, as cutaneous presentations are becoming increasingly common.
ASJC Scopus subject areas
- Pathology and Forensic Medicine