Abstract
Podoplanin is a type I integral membrane glycoprotein that, because it is expressed in lymphatic endothelium, but not in vascular blood vessel endothelial cells, is commonly used in the identification of lymphatic endothelial differentiation in vascular endothelial neoplasms and lymphatic invasion by tumor. Because podoplanin is also expressed in mesothelial cells and fetal gonocytes, it has proved to be a useful marker for assisting in the differential diagnosis of mesotheliomas and germ cell tumors, particularly seminomas/dysgerminomas. Podoplanin expression has also been reported in a wide variety of other neoplasms, including hemangioblastomas, meningiomas, cartilaginous tumors, and follicular dendritic cell neoplasms. This article reviews the information that is currently available on the application of podoplanin immunostaining in diagnostic pathology.
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