Certain families can have a defect in the genes which increases susceptibility of developing Tumours. Studies on mice have shown an association of genetic with tumours

read this paper: https://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2131108

Chances of tumour reappearance of will dependent on multiple factors, like

• Type of tumour (e.g. benign or malignant
• its position
• if it has metastasized
• the affect to the treatments and medication used 
• and the person environment
• etc

Some tumour can be very aggressive in nature and the likely chance of remission will increase.

If its an benign then is not a cancer, but malignant tumour, due to their appearance and behaviour, can be considered a cancer (metastasis)