In the first half of Saturday's contest at GMHBA Stadium, Henry's foot appeared to be stood on in what initially seemed an 'innocuous' incident.
However, on Tuesday morning, Henry's injured foot scans revealed the Lisfranc ailment, referring to ligament damage in the middle region of the foot.
While the defender-forward battled a foot injury during the pre-season, Henry's current injury is a different concern and was sustained in the opposite foot.
Geelong GM of Football Simon Lloyd addressed Henry's setback on Tuesday, noting there currently isn't a timeline for his return.
"We were surprised to see the results of the scans as the incident occurred innocuously during the game," Lloyd claimed. "Our medical team will now work through the options available to provide the optimal outcome for Jack and determine how long he will be sidelined for.
"We are all disappointed for Jack, he is a very important player for us, not just with his flexibility to play a number of roles, but because of his calm head and stability he provides down back.
"We know Jack's work ethic and the attitude he has towards his training and football and [we] know he will attack his rehab in the same manner."
"Mark Blicavs ran today and, as Mark can do, ran very well. So he'll be part of the reconditioning program, and that will be his focus at the moment," Lloyd continued.
"Tom Hawkins is running well, his strength has improved. He's hitting all the markers that he needs to hit, and he'll complete main training on Wednesday."
The Cats are preparing for a blockbuster clash with Collingwood this Friday night at the MCG.