James Mortimer 24.Feb.2014Getty Images
Thorn, who has played over 110 Investec Super Rugby matches and is a 60-Test All Black, came off the field in the first half during the Highlanders second round win against the Blues.
While the news isn’t ideal for the Highlanders, their other starting lock in Jarrad Hoeata had an impressive game, while Josh Bekhuis is an option to start.
Flanker Gareth Evans eventually finished the game at lock for the Otago based franchise, and will be another player Jamie Joseph might look at to start in what was an impressive tight five for the winning Southerners.
Thorn is expected to be back playing by mid-March, likely to be against the Hurricanes at Forsyth Barr Stadium.
If early signs are any indication, the crowds around the enclosed ground will only grow, with the healthy crowd giving their team a standing ovation at halftime.