there is precious little - so what there is has to be made the best of.

at the moment it sounds as though the main problem is the profuse blood loss from the tumour.

so, the main symptom could be selected
[rubrics from the tbr]
1962 ulcers bleeding

then, unfortunately, it is necessary to use clinical rubrics, because of the lack of symptom info.

1900 fungus haematodes
1973 ulcers cancerous

that brings the selection to:

carb-v, nit-ac, phos, sil, sulf

in order to decide between these one might look at the type of stuff coming out of the growth, if other than pure blood e.g. pus, colour, odour, excoriating etc. at what time of day or night the flow is heaviest and any other aggravation factors. is the bleeding from the edge or the centre of the tumour.
any change of appetite or changes in other parts of the body such as teeth, eyes etc.