Ian Toothill said he believes he is the first cancer patient to scale the world's highest mountain.
The Sheffield Wednesday fan planted a flag of rivals Sheffield United at the summit for charity.
The 47-year-old personal trainer, who reached the summit on Monday, has raised almost £31,500 ($40,600) for Macmillan.
He tweeted: "Nothing to see here, just some cancer dude [Sheffield Wednesday] fan on the summit of Everest with a @SUFC_tweets flag."
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Mr Toothill, originally from Sheffield, lives in Willesden Green in London and has climbed in the Himalayas.
He was diagnosed with bowel cancer in June 2015 and told in early 2016 that he had beaten the disease, but later found out it had returned.
He said he has been told he has "just several months left to live".
Speaking to BBC Radio Sheffield in February, he said: "I'm determined to prove anything is possible."
He reached the top of the North Col route on 16 May and the summit of Everest on 5 June.
Miss NJP tweeted: "What an amazing achievement and a wonderful moment for @IanToothill. Feeling emotional. So glad you made it to the top #climbingforcancer".
The Sheffield Wednesday fan planted the rival Sheffield United flag at the summit after a friend donated £1,000.
Mr Toothill was accompanied part-way of the climb by Leslie Binns, from Rotherham, who abandoned his climb to the summit after saving the life of a fellow climber last June.
His fundraising bid raised almost £31,500, beating the target of £29,100.

The decision to dedicate part of the radio spectrum to a global flight tracking system was taken at a UN conference in Geneva on Wednesday.
The conference aimed to improve on the current tracking system which relies on ground-based radars.
MH370 disappeared in March 2014 with 239 people on board.
Representatives from more than 160 countries decided to set aside a radio frequency for the satellite tracking of planes at the World Radiocommunication Conference (WRC), organised by the UN's International Telecommunication Union (ITU).
The deal will enable satellites to receive transmissions, known as automatic dependent surveillance-broadcast (ADS-B), that aircraft currently only send to other aircraft and to ground stations.
This will allow "real-time tracking of aircraft anywhere in the world," said Francois Rancy, head of the ITU's Radiocommunication Bureau.
The disappearance of flight MH370 exposed weaknesses in worldwide air navigation systems.
The current system leaves around 70% of the world's airspace uncovered.
Soon after the plane disappeared, Malaysia's communication minister urged the ITU to help find new ways of transmitting flight data in real-time.
The Malaysia Airlines flight was en route from Kuala Lumpur to Beijing when air traffic control staff lost contact with it.
The plane is long believed to have crashed into the southern Indian Ocean.
In July part of an aircraft wing was found on Reunion Island. Malaysian authorities later confirmed the debris to be from the missing MH370 plane.
Following Wednesday's decision, ITU Secretary-General Houlin Zhao said the agency had "responded in record time to the expectations of the global community on the major issue concerning global flight tracking."
The UN's aviation arm, the International Civil Aviation Organisation (ICAO), has set a November 2016 deadline for adopting new tracking guidelines.
These will include aircraft sending their position at least every 15 minutes, or more in case of emergency, reported Reuters.
A terminal cancer patient who has been told he has just months to live has conquered Mount Everest.
[NEXT_CONCEPT]
A deal has been struck on using satellites to track planes, motivated by the disappearance of Malaysia Airlines flight MH370 last year.