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AJNR - American Journal of Neuroradiology

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Intraosseous Lipoma of the Left Frontoethmoidal Sinuses and Nasal Cavity

W.M.A. Abdalla^a, A.C.B.S. da Motta^a, S.Y. Lin^b, E.F. McCarthy^c and S.J. Zinreich^a

^a The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Hospital, Baltimore, Md
^b Department of Otolaryngology-Head and Neck Surgery, The Johns Hopkins Outpatient Center, Baltimore, Md
^c Department of Pathology, The Johns Hopkins Hospital, Baltimore, Md

View larger version (43K): [in this window] [in a new window]   Fig 1. A, Coronal CT scan of the paranasal sinuses (bone window setting) shows the osteolipoma passing through the left ethmoidal sinus into the left nasal cavity. B and C, Coronal CT scan of the paranasal sinuses (bone window setting) (B) and sagittal reformatted image (C) show the osteolipoma based on the roof of the left frontal sinus.

View larger version (105K): [in this window] [in a new window]   Fig 2. Low-power photomicrograph (hematoxylin-eosin, original magnification x40) shows mature adipose tissue surrounding spicules of lamellar bone.

View larger version (83K): [in this window] [in a new window]   Fig 3. A and B, Follow-up coronal CT scans (bone window setting) show regrowth of the osteolipoma.

View larger version (50K): [in this window] [in a new window]   Fig 4. A and B, Preoperative (A) and postoperative (B) views of the left nasal cavity.