** Shares of Mustang Bio MBIO.O soar 17.4% to 73 cents -
set for biggest one-day pct jump in nearly three months
** MBIO says the U.S. FDA granted Orphan Drug designation to
MB-106, its experimental CAR T cell therapy for the treatment of
Waldenstrom macroglobulinemia - a cancer which starts in certain
white blood cells urn:newsml:reuters.com:*:nGNX8xLR06
** The designation is meant for drugs that are intended for
the treatment or prevention of rare diseases affecting fewer
than 200,000 people in the United States
** Benefits of the orphan drug tag include a potential seven
years of market exclusivity upon approval of the treatment
** Stock has plunged 56% YTD
(Reporting by Amruta Khandekar)
((Amruta.Khandekar@thomsonreuters.com;))