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AJNR - American Journal of Neuroradiology

Published ahead of print on September 20, 2007
doi: 10.3174/ajnr.A0656

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High Prevalence of Pineal Cysts in Healthy Adults Demonstrated by High-Resolution, Noncontrast Brain MR Imaging

Y. Pu^a,b, S. Mahankali^a,c, J. Hou^a, J. Li^a, J.L. Lancaster^a, J.-H. Gao^a,b, D.E. Appelbaum^b and P.T. Fox^a

^a Research Imaging Center, The University of Texas Health Science Center at San Antonio, Tex
^b Department of Radiology, The University of Chicago, Chicago, Ill
^c Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, Tex

View larger version (19K): [in this window] [in a new window]   Figure 1. Large pineal cyst in a healthy 38-year-old man. A, Sagittal noncontrast T1WI (gradient-echo; TR/TE/flip angle = 24 ms/6 ms/25°). B, Axial T2WI (fast spin-echo; TR/TE/echo-train length = 4200 ms/128 ms/14). C, Sagittal noncontrast follow-up T1WI, 8 years and 7 months after initial scans. D, Sagittal noncontrast follow-up T2WI, 8 years and 7 months after initial scans. The arrows indicate the pineal cyst. The pineal cyst touches the superior colliculi of the quadrigeminal plate without causing any deformity. However, no evidence of an obstructive hydrocephalus or of a narrowing of the aqueduct of the midbrain is seen.

View larger version (43K): [in this window] [in a new window]   Figure 2. Small cystic change in the pineal gland of a healthy 25-year-old man. A, Sagittal noncontrast T1WI (gradient echo; TR/TE/flip angle = 24 ms/6 ms/25°). B, Axial T2WI (fast spin-echo; TR/TE/echo-train length = 4200 ms/128 ms/14). The arrows point to the cystic change in the pineal gland.