** Shares of drugmaker ImmunoGen Inc IMGN.O rise 7.4% to
$16.92
** Says patients with a rare blood cancer called blastic
plasmacytoid dendritic cell neoplasm showed response after
treatment with co's experimental drug pivekimab sunirine,
according to updated data from a mid-stage trial
** Adds no new safety signals were observed and the drug
continues to show "manageable safety"
** IMGN shares are now up more than three times since early
May, when co reported positive data from its ovarian cancer
drug's late-stage trial
** Including session's move, ImmunoGen has now gained ~$2.6
bln in market cap since early May, according to no. of shares
outstanding in the latest quarterly filing
(Reporting by Raghav Mahobe)
((Raghav.Mahobe@thomsonreuters.com;))