Pineal Cystic Germinoma with Syncytiotrophoblastic Giant Cells Mimicking MR Imaging Findings of a Pineal Cyst
Yoshiko Hayashidaa,
Toshinori Hiraia,
Yukunori Korogic,
Masato Kochib,
Noriko Maruyamaa,
Masayuki Yamuraa and
Yasuyuki Yamashitaa
a Department of Radiology, Kumamoto University School of Medicine, Kumamoto, Japan
b Department of Neurosurgery, Kumamoto University School of Medicine, Kumamoto, Japan
c Department of Radiology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
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FIG 1. Sagittal MR images obtained in a 4-year-old boy with precocious puberty.
A, Sagittal contrast-enhanced T1-weighted MR image shows a 16 x 13 x 13 mm pineal cyst with enhancement of slightly thickened wall and focal wall irregularity (arrow).
B, 3D CISS imaging reveals a focal lobulation (arrow) and a nodule-like area (arrowhead) of the lesion. Although it is difficult to distinguish the lesion from a pineal cyst even on the CISS images, the morphological description of the lesion is atypical for a pineal cyst.
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