Waiting on results

Hi, 

we are waiting on results of biopsies from my Dad. It is believed after 2 colonoscopys that he has bowel cancer? 

Apparently 1st biopsy results come bk negative but they say the tumours are malignant in appearance. 

We are very confused & anxious, 9 weeks of tests & waiting & no further on. 

Meanwhile my dad is failing rapidly! 

Is this a normal timescale to wait?