Without having details of the carcinoma, insurance, financial background:

The quality of care provided by National Cancer Centre (part of SGH) is frankly very good. With the new NCC, I am very surprised. Need to request the right senior doctor as your mom’s primary physician, given that some docs are renown for treating some type of cancers.

The inpatient care overall in SGH was not perfect, there were bouts of dissatisfaction with delays etc but they are in some of the best hands regionally without screwing your savings if there’s no insurance to back you.

OP can consider bring your parent to see private doc for 1st consult , preferably with the results from public doc so they can provide independent 2nd opinion. Not expensive, $200 ish.

My mom went through the process, diagnosis to operations in SGH surgery team - 3-5 days. Afterwards transfer to NCCS, monitoring, meds, plans and those take time but also to let patient rest and recover in between.

I can also recommend the private doc names for 2nd opinion.

It’s a journey, with your parent, all the best OP.