Her husband is a billionaire and she has access to some of the best healthcare out there. Not that many people from India get a mamogram on a regular basis. So her husband's wealth must have helped her with the screening that helped her to diagnose breast cancer at an early stage.
Her husband being a billionaire is besides the point.
Your conclusion doesn't follow your premise. It's at best a speculation.
Do you think only billionaires in India get diagnosed with cancer, and the remaining cases go undiagnosed?
Both billionaires and non-billionares in India get diagnosed with cancer at an early stage. Sure, plenty go undiagnosed as well, and there are plenty of late diagnosis as well.
(The final outcome in the end is a different question though).
The idea is that as her husband is a billionaire, she had access to better healthcare and more likely to undergo screening. I know many breast cancer patients from India and almost none of them underwent regular screening, and as a result all of them caught the disease as it had progressed a lot more than the case of Seema. As she had access to regular screening, and got diagnosed at a earlier stage, her prognosis was a lot better than for the average upper class Indian with access to quality medical insurance. You must also consider the fact that most medical insurance in India dont cover breast cancer screening.