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AJNR - American Journal of Neuroradiology

Published ahead of print on January 9, 2008
doi: 10.3174/ajnr.A0935

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American Journal of Neuroradiology 29:550-551, March 2008
© 2008 American Society of Neuroradiology

Case Report
HEAD & NECK

Sphenoid Sinus Osteoma at the Sella Turcica Associated with Empty Sella: CT and MR Imaging Findings

C.Y. Chen^a,b, S.H. Ying^a,d, M.S. Yao^b, W.T. Chiu^c and W.P. Chan^a,b

^a Department of Radiology, School of Medicine, Taipei Medical University, Taipei, Taiwan, Republic of China
^b Department of Radiology, Taipei Medical University–Wan Fang Hospital, Taipei, Taiwan, Republic of China
^c Department of Neurosurgery, Taipei Medical University–Wan Fang Hospital, Taipei, Taiwan, Republic of China
^d Department of Orthopedic Surgery, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China

Please address correspondence to Wing P. Chan, MD, Department of Radiology, Taipei Medical University–Municipal Wan Fang Hospital, 111 Hsing Long Rd, Section 3, Taipei 116, Taiwan, Republic of China; e-mail: wingchan{at}tmu.edu.tw

SUMMARY: A 50-year-old woman presented with intermittent headache for the past few years. A paranasal sinus CT scan showed a diffusely calcified lesion at the roof of the sphenoid sinus and sella turcica, with the sellar floor bony cortex involved. Empty sella was noted. MR imaging revealed a soft-tissue lesion with low signal intensity on T1-weighted images, high signal intensity on T2-weighted images, and heterogeneous enhancement on postgadolinium images. Histologic examination revealed an osteoma composed of mature lamellar bone.