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Abstract #1184

MR and Proton MR Spectroscopy Findings of a Pediatric Case with Solitary Intracranial Rosai-Dorfman Disease in the Posterior Fossa

Sehnaz Tezcan1, Muhtesem Agildere1, Taner Sezer2, Ozge Ozturk1, and Aydın Sav3

1Radiology, Baskent University Hospital, Ankara, Turkey, 2Pediatrics, Division of Neurology, Baskent University Hospital, Ankara, Turkey, 3Pathology, Acıbadem Maslak Hospital, Istanbul, Turkey

Rosai-Dorfman disease (RDD) is a histioproliferative disorder, rarely affects central nervous system. A 5-year old boy presented with ptosis, diplopia. MR revealed enhancing mass in the cerebellar pedincle and pons. MR Spectroscopy (MRS) of the lesion showed increased Choline/N-acetyl aspartate ratio and lactate peak.. Histopathology was compatible with RDD. Although intracranial RDD generally presents as dural based lesions and supratentorial in location, intraparencymal lesions may be seen.. In this case report a rare form of RDD, posterior fossa parenchyma involvement presented with particular interest to brain MR, MRS and diffusion findings.

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