** U.S.-listed shares of Canadian drug developer Cosciens
Biopharma CSCI.TO CSCI.O fall 39.9% to $3.52 premarket
** Co says its drug macimorelin, when used to diagnose
childhood-onset growth hormone deficiency, failed to meet the
main goal in a late-stage trial
** Says the drug showed a high false-positive diagnosis when
compared to current standard growth hormone stimulation tests
** Childhood-onset growth hormone deficiency occurs when the
pituitary gland doesn't produce enough growth hormone to
stimulate the body's growth
** Co says the data will be further analyzed and discussed
with health authorities
** Up to last close, stock down 21.2% YTD
(Reporting by Christy Santhosh)
((Christy.Santhosh@thomsonreuters.com))