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Melanocytic schwannoma: The cytologic aspect in fine-needle aspiration cytology (FNAC): Report of a case located in the spinal cord

✍ Scribed by J. Sola-Pérez; M. Pérez-Guillermo; A. Bas-Bernal; A. Giménez-Bascuñana; C. Montes-Clavero

Book ID
102817324
Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
526 KB
Volume
11
Category
Article
ISSN
8755-1039

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✦ Synopsis

We describe a case of intramedullary melanocytic schwannoma (MS) studied by means offine-needle aspiration cytology (FNAC).

The main cytologic features were ( I ) large three-dimensional clusters overshadowed by heavy pigment deposits which tested positive for Fontana Masson (and bleached with potassium permanganate), HMB-45, Vimentin, and S-100 protein: (2) loose syncytial monolayered sheets with very little pigment deposit: and (3) isolated spindle cells with polarized nucleus and tapered, thin cytoplasmic ends.

Both the cytologic features and the immunophenotypic profile were nonspecific and on their own were insuficient to allow the diagnosis of MS to be reached. Clinical data and the magnetic resonance image (MRI) in conjuction with the cytologic jindings did suggest the diagnosis of intramedullary MS. Diagn Cytopa-

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