Most search results yielded 替伊莫单抗 ==> Ibritumomab tiuxetan
although I believe to shorten it, they dropped 'tiutexan', bec. 替伊莫单抗stands for 'Ibritumomab' only.

suggestion to differentiate Ibritumomab tiuxetan from Ibritumomab (although risky):
钇90替伊莫嵌合单抗 ===> 90Y-ibritumomab tiuxetan (Zevalin)
as per ***Zevalin is a chimeric antibody radiolabeled with yttrium*** description

嵌合抗体 - chimeric antibody e.g. (Zivalin, Rituximab, Basiliximab, Infliximab, Abciximab)
ending in *** -omab *** are murine antibodies
tositumomab - is antiCD20 murine antibody just like ibritumomab


check out these translations:
西莫单抗 ==> tositumomab
利妥昔单抗 ==> rituximab
巴利昔单抗 ==> Basiliximab
英利昔单抗 ==> Infliximab
阿昔单抗 ==> Abciximab
therefore...
替伊莫单抗 ==> Ibritumomab

In Brief : Article : Nature Biotechnology This may be in part because Zevalin is a chimeric antibody radiolabeled with yttrium, whereas Bexxar is a mouse antibody using iodine: mouse antibodies are ...
www.nature.com/nbt/journal/v19/n11/full/nbt1101-1003.html - Similar



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Note added at 1 day21 hrs (2010-05-05 15:25:00 GMT)
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unconjugated ("cold") ibritumomab is what is used to call the free form of ibritumomab.

Therefore, I suggest using 非结合型 替伊莫单抗
or 冷型 替伊莫单抗 or 游离型 替伊莫单抗


Yttrium-90-Ibritumomab Tiuxetan Radioimmunotherapy: A new ... by TE WITZIG - 2004 - Cited by 14 - Related articles
In the first trial, cold ibritumomab was used prior to ibritumomab tiuxetan ... provided additional efficacy over the unconjugated ("cold") rituximab alone. ...
cat.inist.fr/?aModele=afficheN&cpsidt=15660412

非结合型单克隆抗体的抗肿瘤作用机制和影响抗体治疗的因素- 已解决- 搜 ... - [ Translate this page ]2009年12月8日 ... 治疗肿瘤用非结合型单抗依靠单抗诱导的免疫效应或单抗的直接效应杀死肿瘤细胞。单独用单抗的主要优点它们的毒副作用小、相关产物安全。
wenwen.soso.com/z/q166715387.htm - Cached

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Note added at 1 day22 hrs (2010-05-05 15:31:17 GMT)
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more info about uncojugated and conjugated MAbs at
http://adam.about.com/reports/000084_7.htm