title: Myeloid sarcoma: a rare case of an orbital mass mimicking orbital pseudotumor requiring neurosurgical intervention.
abstract: Objective. A rare case of myeloid sarcoma (MS), previously referred to as granulocytic sarcoma or chloroma, is presented. Representing a unique form of acute myeloid leukemia (AML), MS may rarely occur in adults. Even rarer, MS may occur as the initial presentation of AML. Methods. We report a singular and illustrative case of an orbital pseudotumor mimicking mass in a 65-year-old male as the initial presentation of AML. Results. Neurosurgical intervention was required to establish the definitive diagnosis via right modified orbitofrontozygomatic craniotomy as well as to decompress the optic canal, superior orbital fissure, and orbit. Conclusion. Postoperatively, he reported decreased pain and improvement of his vision. Further examination revealed decreased proptosis and improved extraocular mobility. Pathological findings demonstrated MS. We review the literature and discuss the neurosurgical relevance of MS as the initial presentation of AML.
authors.affiliation: School of Medicine, Trinity College Dublin, Dublin, Ireland.
authors.forename: Christopher
authors.identifier: 0000-0001-6321-7037
authors.initials: C
authors.lastname: Payne
authors.affiliation: Department of Neurological Surgery, College of Medicine at Urbana-Champaign, Carle Foundation Hospital, University of Illinois, 602 West University Avenue, Urbana, IL 61801, USA.
authors.forename: William C
authors.initials: WC
authors.lastname: Olivero
authors.affiliation: Department of Internal Medicine, College of Medicine at Urbana-Champaign, University of Illinois, Urbana, IL 61801, USA.
authors.forename: Bonnie
authors.initials: B
authors.lastname: Wang
authors.affiliation: College of Medicine at Urbana-Champaign, University of Illinois, Urbana, IL 61801, USA.
authors.forename: Seong-Jin
authors.identifier: 0000-0002-5040-4201
authors.initials: SJ
authors.lastname: Moon
authors.affiliation: Department of Neurological Surgery, College of Medicine at Urbana-Champaign, Carle Foundation Hospital, University of Illinois, 602 West University Avenue, Urbana, IL 61801, USA.
authors.forename: Arash
authors.initials: A
authors.lastname: Farahvar
authors.affiliation: Division of Biology and Medicine, Brown University, Providence, RI 02912, USA.
authors.forename: Eric
authors.identifier: 0000-0001-9981-7843
authors.initials: E
authors.lastname: Chen
authors.affiliation: Department of Neurological Surgery, College of Medicine at Urbana-Champaign, Carle Foundation Hospital, University of Illinois, 602 West University Avenue, Urbana, IL 61801, USA.
authors.forename: Huan
authors.initials: H
authors.lastname: Wang