At least 22 city dwellers have been diagnosed with cancer following free screening at Mama Lucy Hospital and Mbagathi Hospitals in Nairobi.
Doctors steering the screening have referred two suspected cases for further analysis.
Health officials say the cases are however at a manageable stage.
Seven women were found to be with breast cancer while one man tested positive for prostate cancer at Mama Lucy Hospital.
Twelve women were found to have cervical cancer at Mbagathi.
Nairobi Governor Mike Sonko applauded residents saying the fight against cancer starts with all individuals.
“The numbers that we have seen turn up for screening is encouraging. It shows we are all ready to tackle the monster,” said Sonko.
He said early diagnosis of the killer disease is the first weapon against it.
Mama Lucy medical superintendent Musa Mohamed said the cases can be stopped from escalating to dangerous levels if relevant treatment is administered in time.
“We found eight cases but we want to tell the victims that they can control their situation because it is not at advanced stage,” he said.
The screening exercise is ongoing at the two facilities.
Over 300 people have been screened so far since Monday.