title: Complications of surgical treatment of Rosai-Dorfman disease: A case report and review.
abstract: BACKGROUND
  Rosai-Dorfman disease (RDD) was first described in 1969 as an idiopathic histiocytic proliferative disorder. It commonly presents as a massive and painless adenopathy. Until 1990, extranodal involvement of the central nervous system (CNS) was rare and reported in less than 5% of the total number of patients with extranodal RDD. Complete removal of CNS RDD has been achieved in many cases.
  
  
  METHODS
  We report a case of an isolated intracranial RDD in a 53-year-old man. The patient had an episode of generalized seizures. Imaging studies of the brain were compatible with a meningioma en plaque. The mass was exposed by a right frontotemporal craniotomy. The tumor was adhered tightly to the adjacent cerebral cortex and was permeated by pial arteries of the brain surface. The sacrificing of these arteries was inevitable in order to achieve the total removal of the tumor. The patient had incomplete left hemiparesis after the surgery. Brain computed tomography (CT) imaging revealed a postoperative hemorrhage and a low-density lesion in the right frontal lobe. The patient was postoperatively diagnosed with isolated central nervous system RDD.
  
  
  CONCLUSIONS
  Although the complete removal of dural-based lesions without any neurological deficits has been performed in many cases, the treatment of cases with high risks, such as the present case, indicates conservative excisions and adjuvant radiotherapy with or without chemotherapy.
authors.affiliation: Department of Neurosurgery, School of Medicine, Keio University, Tokyo, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Tomio
authors.forename: Makoto
authors.initials: M
authors.lastname: Katayama
authors.forename: Nobuo
authors.initials: N
authors.lastname: Takenaka
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Imanishi