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[Cutaneous neural neoplasms--an update].

T Mentzel1

  • 1Institut für Pathologie, Friedrich-Schiller-Universität Jena.

Verhandlungen Der Deutschen Gesellschaft Fur Pathologie
|March 30, 1999
PubMed
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Recent advances in immunohistochemistry and electron microscopy have identified distinct benign cutaneous neural tumors beyond neurofibroma and schwannoma. Understanding these entities, including neurothekeoma and solitary circumscribed neuroma, is crucial for accurate diagnosis and avoiding misclassification.

Area of Science:

  • Dermatopathology
  • Surgical Pathology
  • Oncology

Context:

  • Benign cutaneous neural tumors were previously broadly categorized as peripheral nerve sheath tumors (PNST).
  • Recent advancements in immunohistochemistry and electron microscopy have enabled the identification of distinct neural tumor entities.
  • Accurate differentiation is essential to prevent misdiagnosis of more aggressive neoplasms.

Purpose:

  • To delineate newly described benign cutaneous neural tumors.
  • To highlight key histological and immunohistochemical features differentiating these entities.
  • To emphasize the importance of recognizing these distinct neoplasms for accurate diagnosis.

Summary:

  • Neurothekeoma presents in myxoid and cellular forms, with typical neurothekeoma (nerve sheath myxoma) showing S-100 positive cells in a myxoid stroma, while cellular neurothekeoma exhibits S-100 negative cells positive for NKIC3.

Related Experiment Videos

  • Solitary circumscribed neuroma (palisaded encapsulated neuroma) is a well-circumscribed dermal neoplasm composed of S-100 positive schwann cells and neurofilament positive axons.
  • Perineurioma, a rare neoplasm, is characterized by spindle-shaped cells positive for vimentin and EMA, lacking S-100 protein.
  • Unusual schwannoma variants like cellular, plexiform, and melanocytic schwannoma are also briefly discussed.

    • Impact:

    • Improved diagnostic accuracy for benign cutaneous neural tumors.
    • Reduced misdiagnosis of malignant neoplasms.
    • Enhanced understanding of the spectrum of neural tumor differentiation.