Mesothelioma of the tunica vaginalis testis with prominent adenomatoid features: a case report |
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Authors: | Lian-He Yang Juan-Han Yu Hong-Tao Xu Xu-Yong Lin Yang Liu Yuan Miao Liang Wang Chui-Feng Fan Gui-Yang Jiang Si-Lu Ding Guang Li En-Hua Wang |
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Affiliation: | 1.Department of Pathology, The First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang 110001, China;2.Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110001, China;3.Department of Radiotherapy, The First Affiliated Hospital and College of Basic, Medical Sciences, China Medical University, Shenyang 110001, China |
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Abstract: | Malignant mesotheliomas of the testis arise from the tunica vaginalis, formed from the evagination of the abdominal peritoneum into the scrotum. It is an extremely rare tumor representing 0.3% to 5% of all malignant mesotheliomas. We presented an interesting case of 68-year-old male with swelling and slightly painful in the right scrotum. Histologically, the lesion were composed of small tubular, microcystic, gland lined by flattened epithelioid cells and vague signet ring cells set in a myxofibrous stroma, which is resemblance to adenomatoid tumor. But the tumor cells showed significant atypical cytologic morphology and invaded into spermatic cord tissue, which indicated the diagnosis of malignant tumor. Immunohistochemistry study showed positive expression of CK, CK5/6, CK7, Calretinin, D2-40 and Vimentin which indicated the diagnosis of malignant mesothelioma. This case of mesothelioma should be classified as epithelial in type. To our knowledge, the mesothelioma of the tunica vaginalis testis with adenomatoid tumor-like microscopic features is very rare. |
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Keywords: | Mesothelioma tunica vaginalis testis histology adenomatoid |
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