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Segmental neurofibromatosis: immunocytochemical analysis of cutaneous lesions

Segmental neurofibromatosis: immunocytochemical analysis of cutaneous lesions

Journal of the American Academy of Dermatology 22(4): 617-621

Cutaneous lesions from three patients with segmental neurofibromatosis were evaluated. Routine histologic studies revealed the presence of redimentary neural structures within an abundant collagenous matrix. The majority of the cells in all three cases expressed S-100 protein, suggesting their identity as Schwann cells. The stromal component stained positively for fibronectin and type IV collagen; the latter indicated the presence of basement membrane material. Embedded in the tumor mass were glandular epithelial structures that stained with epithelial membrane antigen antibody. Staining for factor VIII-related antigen revealed vascular endothelium and multiple scattered mast cells. In one case strands of cells stained with antibodies to desmin, suggesting muscle cell differentiation. This case may represent a distinct subset of neurofibromas.

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Accession: 033324789

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PMID: 2108195

DOI: 10.1016/0190-9622(90)70083-t

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