| Usefulness of cytokeratin subsets for distinguishing monophasic synovial sarcoma from malignant peripheral nerve sheath tumor. | |
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MedLine Citation:
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PMID: 10549251 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Monophasic synovial sarcoma (MSS) and malignant peripheral nerve sheath tumor (MPNST) are spindle cell sarcomas with overlapping histologic features, and their immunophenotypes may overlap, since MPNSTs express S-100 protein in only 50% to 60% of cases and rarely express epithelial markers, whereas MSSs can express S-100 protein in up to 40% of cases. We immunostained 29 cases of MSS and 29 cases of MPNST with antibodies to AE1/AE3, CAM 5.2, epithelial membrane antigen (EMA), S-100 protein, and cytokeratin subsets 7 and 19. Inclusion criteria for MSS included a consistent histology with expression of at least 1 epithelial marker. Inclusion criteria for MPNST included a tumor with a consistent histology arising in a patient with neurofibromatosis type 1 and/or in a plexiform neurofibroma, or ultrastructural confirmation of clear-cut schwannian differentiation. By definition, all cases of MSS were positive for at least 1 epithelial marker. Ten cases showed focal S-100 protein immunoreactivity, and 26 cases stained for cytokeratins 7 and 19. Twenty-three cases stained for both antigens, whereas only 2 cases were negative for both cytokeratins. Twenty-two MPNSTs demonstrated immunoreactivity for S-100 protein, and 11 stained focally for AE1/AE3 or EMA. Two cases of MPNST stained for cytokeratin 7, and only 1 case stained for cytokeratin 19. No cases of MPNST stained for both cytokeratins. Antibodies to cytokeratins 7 and 19 are useful adjuncts for the separation of MSS from MPNST. The majority of MSSs stain for one or both of these antigens, whereas most MPNSTs, including those that are EMA- or AE1/AE3-positive, do not express these cytokeratin subsets. |
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Authors:
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T A Smith; S K Machen; C Fisher; J R Goldblum |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of clinical pathology Volume: 112 ISSN: 0002-9173 ISO Abbreviation: Am. J. Clin. Pathol. Publication Date: 1999 Nov |
Date Detail:
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Created Date: 1999-11-18 Completed Date: 1999-11-18 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0370470 Medline TA: Am J Clin Pathol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 641-8 Citation Subset: AIM; IM |
Affiliation:
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Department of Anatomic Pathology, Cleveland Clinic Foundation, OH 44195, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Diagnosis, Differential Humans Immunoenzyme Techniques Keratin-7 Keratins / analysis* Nerve Sheath Neoplasms / chemistry, diagnosis* Sarcoma, Synovial / chemistry, diagnosis* Soft Tissue Neoplasms / chemistry, diagnosis* Tumor Markers, Biological / analysis* |
| Chemical | |
Reg. No./Substance:
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0/KRT7 protein, human; 0/Keratin-7; 0/Tumor Markers, Biological; 68238-35-7/Keratins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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