title: Diagnostic implications of podoplanin expression in peripheral nerve sheath neoplasms.
abstract: By using the D2-40 antibody, we have observed podoplanin expression in Schwann cells and perineurial cells. Podoplanin expression has not been well characterized in peripheral nerve sheath tumors. Because neoplasms of neural crest lineage, including peripheral nerve sheath and melanocytic neoplasms, may share histologic and immunohistochemical characteristics, we evaluated podoplanin and S-100 expression in these lesions to determine the usefulness of podoplanin as a diagnostic marker. Diffuse podoplanin and S-100 expression was observed in 16 (76%) of 21 classical schwannomas, 6 (100%) of 6 cellular schwannomas, and 3 (75%) of 4 epithelioid malignant peripheral nerve sheath tumors (EMPNSTs). Podoplanin was expressed in 3 (7%) of 43 neurofibromas, 16 (21%) of 75 spindle cell MPNSTs (SMPNSTs), and 1 (10%) of 10 spindle cell melanomas but was absent in conventional melanoma. Only rare neurofibromas and SMPNSTs showed strong coexpression of podoplanin and S-100. These results suggest diffuse podoplanin expression or coexpression of podoplanin and S-100 is limited to schwannoma and EMPNST and may be useful in the evaluation of these neoplasms.
authors.affiliation: Department of Pathology, University of Washington, Seattle, USA.
authors.forename: Chris H
authors.initials: CH
authors.lastname: Jokinen
authors.forename: Soheil S
authors.initials: SS
authors.lastname: Dadras
authors.forename: John R
authors.initials: JR
authors.lastname: Goldblum
authors.forename: Matt
authors.initials: M
authors.lastname: van de Rijn
authors.forename: Robert B
authors.initials: RB
authors.lastname: West
authors.forename: Brian P
authors.initials: BP
authors.lastname: Rubin
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism*; D006801:Humans; D008545:Melanoma / Q000175:diagnosis / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000378:metabolism*; D018317:Nerve Sheath Neoplasms / Q000175:diagnosis / Q000378:metabolism*; D009442:Neurilemmoma / Q000175:diagnosis / Q000378:metabolism*; D009455:Neurofibroma / Q000175:diagnosis / Q000378:metabolism; D009418:S100 Proteins / Q000378:metabolism; D012583:Schwann Cells / Q000378:metabolism / Q000473:pathology; D046888:Tissue Array Analysis; D000098853:Podoplanin
chemical_list: D014408:Biomarkers, Tumor; D008562:Membrane Glycoproteins; D009418:S100 Proteins; C117468:PDPN protein, human; D000098853:Podoplanin