title: Selective intraarterial radionuclide therapy with Yttrium-90 (Y-90) microspheres for hepatic neuroendocrine metastases: initial experience at a single center.
abstract: OBJECTIVE
  Selective intraarterial radionuclide therapy (SIRT) with Yttrium-90 (Y-90) microspheres is also known as radioembolization and delivers high doses of radiation to hepatic tumors with minimum healthy liver exposure. The aim of this study was to present our preliminary experience in the role of liver directed radiotherapy with Y-90 microspheres for the treatment of unresectable hepatic metastases from neuroendocrine tumors (NET).
  
  
  METHODS
  The results of SIRT in 10 patients (5 males, 5 females; mean age 48.7 years; age range 24-73 years) with metastatic liver disease from NETs during the period from April 2008 through August 2010 were reviewed. All patients had meticulous pre- and post-imaging studies as a part of their work-up procedure, as well as serologic tests of liver function to determine the extent of liver function damage. The patients who were eligible for SIRT had pretreatment visceral angiography to define and occlude non-target arteries.
  
  
  RESULTS
  The mean +/- SD administered SIR-Spheres activity was 1.49 +/- 0.42 GBq (range 0.72-2.21 GBq) in all the patients. These treatments delivered a dose of 99.73 +/- 66.36 Gy (range 49-420.8 Gy) to the target tumors. The estimated dose to the lungs and normal liver was 4.45 +/- 1.95 Gy (range 2.4-8.5 Gy) and 26.73 +/- 14.19 Gy (range 5-58.9 Gy), respectively. Overall response rate of 90% and patient tolerance was satisfactory for most patients.
  
  
  CONCLUSIONS
  From our limited experience, we can conclude that SIRT with Y-90 microspheres is a safe and efficacious treatment option for patients with liver metastasis of NET without any serious side effects.
authors.affiliation: Gülhane Military Medical Academy and Medical Faculty, Department of Nuclear Medicine, Ankara, Turkey. narslan@gata.edu.tr
authors.forename: Nuri
authors.initials: N
authors.lastname: Arslan
authors.forename: Mustafa
authors.initials: M
authors.lastname: Emi
authors.forename: Engin
authors.initials: E
authors.lastname: Alagöz
authors.forename: Bahri
authors.initials: B
authors.lastname: Ustünsöz
authors.forename: Kaan
authors.initials: K
authors.lastname: Oysul
authors.forename: Fikret
authors.initials: F
authors.lastname: Arpaci
authors.forename: Sahin
authors.initials: S
authors.lastname: Uğurel
authors.forename: Murat
authors.initials: M
authors.lastname: Beyzadeoğlu
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Ozgüven
mesh_terms: D000328:Adult; D000368:Aged; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D007261:Infusions, Intra-Arterial; D008113:Liver Neoplasms / Q000532:radiotherapy* / Q000556:secondary*; D008297:Male; D008863:Microspheres; D008875:Middle Aged; D018358:Neuroendocrine Tumors / Q000532:radiotherapy* / Q000556:secondary*; D019275:Radiopharmaceuticals / Q000008:administration & dosage*; D015021:Yttrium Radioisotopes / Q000008:administration & dosage*
chemical_list: D019275:Radiopharmaceuticals; D015021:Yttrium Radioisotopes