EXHIBIT 21.1

SUBSIDIARIES OF THE REGISTRANT

					Jurisdiction of
Name	Direct Parent(s)	Ownership			Incorporation
Genzyme Europe B.V.	Imtix SangStat (Switzerland) GmbH		100	%	The Netherlands
Genzyme Flanders BVBA	Genzyme International Holdings Limited Genzyme Global S.à.r.l.	99.9% 0.1%			Belgium
Genzyme International Holdings Limited	Genzyme Global S.à.r.l.		100	%	Republic of Ireland
Genzyme Ireland Limited	Genzyme International Holdings Limited		100	%	Republic of Ireland
Genzyme Limited	Genzyme Global S.à.r.l		100	%	England
Genzyme Polyclonals S.A.S.	SangStat Medical, LLC		100	%	France
Genzyme Therapeutic Products Limited Partnership	Genzyme Therapeutic Products Corporation Genzyme Corporation		1 99	% %	Massachusetts, United States
Genzyme Therapeutic Products Corporation	Genzyme Corporation		100	%	Massachusetts, United States
Imtix SangStat (Switzerland) GmbH	Genzyme Global S.à.r.l.		100	%	Switzerland
Genzyme Global S.à.r.l.	Genzyme Luxembourg S.à.r.l.		100	%	Luxembourg
Genzyme Luxembourg S.à.r.l.	Genzyme Corporation		100	%	Luxembourg