** Drug developer's shares SESN.O slide ~9% to 62 cents
** Says FDA agreed to majority of SESN proposed plan for
additional late-stage study that company plans to conduct for
its bladder cancer drug
** Says the company plans to further talk to the FDA in the
coming months for the remaining outstanding items related to
study
** In Aug, the FDA rejected the blood cancer drug; the trial
was marked by misconduct and several other issues, according to
Stat News urn:newsml:reuters.com:*:nL4N2PP3CL urn:newsml:reuters.com:*:nL1N2PK1U9
** Stock one of the top pct loser on the Nasdaq Biotech
Index .NBI
** Up to Tues close, SESN down 17% YTD and down ~74% in the
past 12 months
(Reporting by Ankur Banerjee)