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Head and Neck Pathology

, Volume 6, Issue 3, pp 384–388 | Cite as

Frontal Sinus Osteoma with Osteoblastoma-like Histology and Associated Intracranial Pneumatocele

  • Larisa M. Lehmer
  • Phillip Kissel
  • Bruce D. Ragsdale
Case Report

Abstract

Osteomas of the cranial sinuses are rare, benign bony tumors that can be complicated by the formation of an intracranial pneumatocele. If not treated promptly, a pneumatocele can lead to abscess formation, meningitis, or ventriculitis. In the present case, an intracerebral pneumatocele was formed when an 18 cm3 osteoma breached the posterior wall of the frontal sinus creating a one-way valve through which air could enter the intracranial cavity. The patient presented after forceful sneezing with nonspecific symptoms of headache, nausea, and vomiting. CT demonstrated a frontal collection of loculated air with mass effect within the left cerebral hemisphere. A partly mineralized mass occupied the left superior nasal ethmoid sinus and left frontal sinus. Of interest pathologically in this case, the tumor had a substantial osteoblastoma-like component. Surgical repair involved frontal craniotomy to remove the osteoma and debride frontal sinus mucosa, plugging the frontal nasal ducts and sinus with fat and bone wax, and dural restoration using an underwater closed drainage system to vent intracranial air and stabilize the patient.

Keywords

Frontal sinus osteoma Osteoblastoma-like areas Pneumatocele Headache 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Larisa M. Lehmer
    • 1
  • Phillip Kissel
    • 2
  • Bruce D. Ragsdale
    • 1
  1. 1.Central Coast PathologySan Luis ObispoUSA
  2. 2.Neurological and Spinal SurgerySan Luis ObispoUSA

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