What are malignant recurrences most recurrently attributable to?

I would be interested in knowing what is most commonly causative of recurrences of malignancy. Improper eradication of cancerous cells? Mutagenesis resulting from oncotherapy? Iatrogenic immunosuppression?
Answers:
malignant recurrences most often attributable to the certainty that one becomes unaware than chemo / oncology is not far enough contained by medical science to eradicate ALL cancer cells.


One should continue proper awareness of self after treatment.

The one getting treatment should be aware of this fact.

Related Questions:
Can you enjoy surgery when the hernia have disappeared?   Is it true that near are places that reimburse you for donating blood?   What are the classes of antibiotics?   Medical science have divided our spine within different parts and name it as coccyx, sacral, lumbar, etc?   Why do i yawn after i cough?  
  • I have a MRI done and be told nearby is fluid on the brain? How serious is this? What could bring it?
  • What if I steal my antibiotics an hour latter?
  • Overdose on doxycycline hyclate?