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. 2020 Mar 2;36(8):1761–1766. doi: 10.1007/s00381-020-04532-7

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© The Author(s) 2020

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Fig. 1 — Case 2. a Non-contrast enhanced CT showing partially calcified choroid plexus papilloma in the fourth ventricle. b Non-contrast enhanced MR T1-weighted sagittal image (left) and contrast enhanced MR T1-weighted axial images (center and right) showing a lobulated enhanced tumor in the fourth ventricle. c A surgical photograph showing a forth ventricle tumor through the cerebellar vallecula. d Gross surgical specimen of fourth ventricle papilloma. Note edematous salmon roe-like appearance