Necrobiotic xanthogranuloma

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Necrobiotic xanthogranuloma, abbreviated NXG, is a rare granulomatous skin condition.

General

  • Usually elderly.[1]
  • Associated with monoclonal gammopathy in most cases.[2]

Gross

Features:

  • Yellow plaques.
  • Periorbital - classic location.[3]
    • 66% of cases periorbital in one series.[4]

Microscopic

Features:[1]

  • "Necrobiotic granuloma":
    • Palisading granuloma with a core collagen-like material.
  • +/-Cholesterol clefts - common.
  • +/-Touton giant cells.
  • +/-Atypical foreign body-type giant cells +/- asteroid bodies.

DDx:

Image

See also

References

  1. 1.0 1.1 Busam, Klaus J. (2009). Dermatopathology: A Volume in the Foundations in Diagnostic Pathology Series (1st ed.). Saunders. pp. 629. ISBN 978-0443066542.
  2. Seastrom, S.; Bookout, A.; Hogan, DJ. (Dec 2014). "Necrobiotic xanthogranuloma without a monoclonal gammopathy.". Cutis 94 (6): 293-6. PMID 25566570.
  3. Fernández-Herrera, J.; Pedraz, J. (Jun 2007). "Necrobiotic xanthogranuloma.". Semin Cutan Med Surg 26 (2): 108-13. doi:10.1016/j.sder.2007.02.008. PMID 17544963.
  4. Higgins, LS.; Go, RS.; Dingli, D.; Kumar, SK.; Rajkumar, SV.; Dispenzieri, A.; Buadi, FK.; Lacy, MQ. et al. (May 2016). "Clinical Features and Treatment Outcomes of Patients With Necrobiotic Xanthogranuloma Associated With Monoclonal Gammopathies.". Clin Lymphoma Myeloma Leuk. doi:10.1016/j.clml.2016.04.009. PMID 27238425.