The operation was performed on Saturday in São Paulo after the Brazilian announced earlier in the week that he would visit the hospital for routine check-ups.
"The tumor was identified during the samples I mentioned last week," Pelé wrote on Instagram.
Earlier on Monday, manager Joe Fraga Pelé de-dramatized hospital visits and health conditions in an interview with the TV channel Globo, before the football legend himself wrote on Instagram.
Pelé is Brazil's leading male goal scorer of all time with 77 goals in 92 international appearances.
During his career, he was among other things and took three World Cup golds (1958, 1962 and 1970).
CLIP: Scandal scenes in the general meeting - authority stopped the match (5 Sep 2021)
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Scandal scenes in the general meeting - authority stopped the match