If surgery is required then 23 year-old Henson will miss Wales's Autumn International series plus their RBS Six Nations campaign as well as the majority of the domestic season with the Ospreys.
The British Lion has flown to the renowned Hans Muller-Woolfhart clinic in Germany for a diagnosis and will discover his fate when he joins up with his region for training in France next week.
The Ospreys star was at the centre of his region's Celtic League triumph and Wales's Grand Slam-winning side last season despite playing for most of it while receiving a prolonged course of anti-inflammatory injections.
The news comes as a bitter blow to Henson following an indifferent tour to New Zealand during which he suffered heartache when left out of the Lions' line-up for the first test against the All Blacks.
Ospreys Team Manager Derwyn Jones has played down the significance of Henson's visit to Germany saying: "Gavin has got a groin problem. He is just going to get it checked out."
Wales Sevens are looking to re-group after a disappointing tournament last time out in South Africa. The next double leg in New Zealand and Las Vegas offers Gareth Williams a chance to redeem themselves.
Wales Women's head coach Rhys Edwards was at Llandovery to see the conclusion of an entertaining Women's Regional championship where any one of three teams were in contention for title glory on the last day of action.
Christmas has come early at Glynneath rugby club, one of a number around Wales who have received an array of merchandise and equipment this December courtesy of the Welsh Rugby Union's £750,000 participation points scheme.
The WRU have been delivering on the scheme - which gives individual clubs access to up to £5,000 worth of supplies and equipment each for the 2014/2015 season - over the last two weeks and today (Friday) were received by a special guest in Glynneath, club president and pitch marker Max Boyce.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.