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."
Welsh players and management joined Deputy Minister for Sport Ken Skates at the Pierhead Building, Cardiff Bay earlier this week to reveal the Union's pioneering school-club hub initiative has been so successful the project will now almost double the scale of the original project.
The Scarlets, Newport Gwent Dragons, Cardiff Blues and the Ospreys look ahead to Judgement Day III which sees the Blues take on the Ospreys (2.30) and the Dragons tackle the Scarlets (4.45pm) at the Millennium Stadium tomorrow afternoon.
Ystradgynlais and Ynysddu played out a titanic struggle at Taffs Well in the SSE SWALEC Bowl semi-final. At the end of the game neither team could be separated after a 15-15 stalemate but Ystradgynlais go through on try count.
Blues strike first in JD III battle - Newport Gwent Dragons lock Andrew Coombs, WRU referee Dylan Llyr Jones and Cardiff Blues hooker Matthew Rees decide dressing room allocations for Judgement Day III
Wales Under 18 captain Calum Haggett has received a conditional offer to read Biomedical Science at St Anne's College, Oxford. WRU chairman Gareth Davies went to meet Calum and Coleg y Cymoedd Principal Judith Evans to wish him luck in his exams and pass on some of his personal experience.
Dodgy tattoos, carthorses, Avatar and soft chins are revealed by Wales Sevens players Tom Williams and Sam Cross as they profile the Wales Sevens squad taking part in Hong Kong this weekend in the latest round of the HSBC Sevens World Series.