The most important issue just now is the renal cancer. This needs to take a front seat in diagnosis and treatment. When this is addressed and reaches a controlled plateau, time can be spent on other issues.
Pulmonary hypertension is treatable medically. (Which means that not all cases need a surgical solution.) A board certified internist or cardiologist could prescribe vasodilators, a number of other drugs or even viagra as part of the medical management of pulmonary hypertension. Calcium channel blockers can also be used.
Fatty liver and high cholesterol can be from a number of sources. Endocrine problems such as hypothyroidism can cause a high cholesterol or hyperlipidemia, so be sure to ask your mother's internist whether hypothyroidism has been assessed as a potential. Poor diet can also contribute, as well as one's heredity. There are some patients who simply don't manage cholesterol well. Gemfibrozil or the statin group can help with this also.
Hypertension or high blood pressure can also be inherited, but it also can be a result of hypothyroidism. Again, a T3, T4, TSH blood testing for hypothyroidism would be a good idea, as would a Hgb AiC looking for Type II diabetes mellitus as a contributor to these syndromes.
The immediate solutions would be to address her renal cancer using an oncologist or nephrologist, and use a board certified internist to manage her constellation of other issues.
In any event, she will need your time, your assistance, and your compassion. Very best wishes to you both.
prof. of medicine