Positive MITF and NKI/C3 Expression in Cellular Neurothekeoma and Dermatofibroma.
Appl Immunohistochem Mol Morphol
; 29(6): 440-445, 2021 07 01.
Article
em En
| MEDLINE
| ID: mdl-33264109
ABSTRACT
BACKGROUND:
Cellular neurothekeoma (CNT) is a benign mesenchymal tumor with uncertain cellular differentiation. Studies have found evidence of myofibroblastic differentiation and possible relation to dermatofibromas (DFs). As microphthalmia transcription factor (MITF) and NKI/C3 stains are routinely positive in CNT, we compared expression patterns of both markers in CNT and DF to assess their relationship. MATERIALS ANDMETHODS:
We assessed cases of CNT (n=25) and DFs (n=35) for histopathologic characteristics and MITF and NKI/C3 expression. Immunostaining results were classified as negative, focally positive (<50%), and diffusely positive (>50%). At least 1 additional melanocytic marker was assessed in each case of CNT.RESULTS:
Both DFs and CNTs showed a female predilection and a wide age range. Immunostaining in CNTs for MITF was positive in the vast majority (focal 68%, diffuse 24%), as was NKI/C3 (focal 72%, diffuse 24%). All DFs were MITF positive (diffuse 74%, focal 26%), and most DFs were NKI/C3 positive (focal 57%, diffuse 3%).CONCLUSION:
CNT and DF share demographic, histopathologic, and immunohistochemical features, including shared expression of MITF and NKI/C3, especially cellular DF.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Neoplasias Cutâneas
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Biomarcadores Tumorais
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Neurotecoma
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Histiocitoma Fibroso Benigno
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Fator de Transcrição Associado à Microftalmia
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Miofibroblastos
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Tetraspanina 30
Limite:
Adolescent
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Adult
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Aged
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Aged80
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Child
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article