Keane joined the Foxes at the start of November and the npower Championship promotion-chasers recently prolonged his stay in the Midlands until the end of January.
Pearson would like to keep the 19-year-old centre-back beyond this month.
"That is something we will have to discuss with United at some point," Pearson told the media in his pre-match press conference ahead of Saturday's trip to Bristol City.
"We are very pleased to have him and he has done well so far. He has a very bright future in the game, but it is one step at a time."
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