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Fig. 1A —19-year-old man presents with headaches and visual disturbances.
Physical examination reveals double vision, vertical gaze paralysis, and
light-near dissociation. Unenhanced CT images of head show well-defined
hyperdense mass arising in pineal region. Large dense calcification is seen in
inferior portion with two adjacent smaller calcifications. Surrounding brain
parenchyma shows mild edema. Obstructive hydrocephalus is present.
