** Shares of medical aesthetics firm Sientra Inc SIEN.O
jump 17.28% to $1.90, premarket
** U.S. Food and Drug Administration (FDA) grants marketing
clearance for company's Portfinder technology
** Portfinder is an electronic handheld device that will
allow clinicians to locate the right administration spot for
tissue expansion with co's Dermaspan and AlloX2 Pro tissue
expanders
** A tissue expander is an empty implant used in
reconstruction surgeries
** Over time tissue expander is gradually filled with saline
to stretch the skin and cause it to grow and create a new
pocket for the long-term implants
** SIEN down about 20% YTD
(Reporting by Vaibhav Sadhamta)
((Vaibhav.Sadhamta@thomsonreuters.com;))