title: Prolonged oral hydroxyurea and concurrent 3d-conformal radiation in patients with progressive or recurrent meningioma: results of a pilot study.
abstract: OBJECTIVE
  Treatment of recurrent and progressive meningiomas remains a challenge in clinical neurooncology. This study was designed to evaluate the efficacy of the simultaneous application of 3d-conformal radiotherapy and chemotherapy with hydroxyurea (HU).
  
  
  METHODS
  Twenty-one patients with recurrent or progressive meningiomas (13 benign, 4 atypical and malignant, 4 with unproven histology) received treatment by fractionated 3d-conformal radiation (55.8-59.4 Gy) and concurrent HU, administered for a median time of three months with a daily dosage of 20 mg/kg. Response was evaluated using clinical and neuro-imaging data.
  
  
  RESULTS
  Disease stabilization was achieved in 14/21 patients (pts). Three pts had significant improvement of tumor associated neurological symptoms with imaging criteria of minor response. Progression free survival rates 1 year and 2 years after the initiation of radio-chemotherapy were 84% and 77%, respectively. At the time of analysis a total of 6/21 pts presented with progressive disease with a median time to progression of 59 weeks. Documented radio- and chemotherapy associated toxicity was minimal; only one patient discontinued HU treatment due to gastrointestinal symptoms such as anorexia and weight loss.
  
  
  CONCLUSIONS
  Results obtained in this study indicate that treatment with HU and simultaneous radiotherapy is safe and effective with disease stabilization in the majority of patients. Randomized trials comparing radiosurgery versus radiochemotherapy versus fractionated radiotherapy are warranted.
authors.affiliation: Department of Radiation Oncology, University Hospitals of Erlangen, 91054 Erlangen, Germany.
authors.forename: Barbara M
authors.initials: BM
authors.lastname: Hahn
authors.forename: Ulrich M H
authors.initials: UM
authors.lastname: Schrell
authors.forename: Rolf
authors.initials: R
authors.lastname: Sauer
authors.forename: Rudolf
authors.initials: R
authors.lastname: Fahlbusch
authors.forename: Oliver
authors.initials: O
authors.lastname: Ganslandt
authors.forename: Gerhard G
authors.initials: GG
authors.lastname: Grabenbauer
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D003131:Combined Modality Therapy; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006918:Hydroxyurea / Q000627:therapeutic use*; D008297:Male; D008577:Meningeal Neoplasms / Q000188:drug therapy / Q000532:radiotherapy; D008579:Meningioma / Q000188:drug therapy* / Q000532:radiotherapy*; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy* / Q000532:radiotherapy*; D010865:Pilot Projects; D020266:Radiotherapy, Conformal; D012074:Remission Induction; D015996:Survival Rate
chemical_list: D000970:Antineoplastic Agents; D006918:Hydroxyurea