Radiology Case Reports (Jun 2023)

ALK-positive histiocytosis involving the cavernous sinus: A deceptive radiologic mimic of meningioma

  • Mohammadreza Alizadeh, MD,
  • Aishwarya Ravindran, MD,
  • Rati Chkheidze, MD,
  • Gaurav Goyal, MD,
  • Mahdie Hosseini, MD,
  • Parnian Shobeiri, MD,
  • Arezoo Shafieioun, MD,
  • Mohammad Khalafi, MD,
  • Ramin Shahidi,
  • Houman Sotoudeh, MD,
  • Aparna Singhal, MD

Journal volume & issue
Vol. 18, no. 6
pp. 2259 – 2263

Abstract

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Anaplastic lymphoma kinase (ALK)-positive histiocytosis is an uncommon condition, recently considered a separate condition from other histiocytosis by WHO 5th edition. It can involve intracranial structures. This manuscript describes a case of ALK-positive histiocytosis of the cavernous sinus, focusing on the radiologic and pathologic presentation of the entity. Our case had MRI manifestations mimicking meningioma, metastasis, and Langerhans histiocytosis. On CT imaging, benign osseous remodeling of the cavernous sinus was detected, which can be helpful in differentiating it from more common meningioma.

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