Source: http://www.tengion. com/news/ press/20080519. cfm

Preclinical Data Demonstrate Ability to Regenerate an Entire Bladder with
Tengion Neo-Bladder ReplacementT

Preclinical Results Show Neo-Bladder Replacement Structurally Similar to
Native Bladder by Six Months; Data Presented at May 18 Press Briefing and
Poster Session

Contact: Gary Sender
Chief Financial Officer
Tengion, Inc.
gary.sender@ tengion.com