my whole left side and let back and leg also feels like this with feeling of stopped blood flow but that is consistent with pelvic congestions syndrome. you said you have a family history polycythemia vera so they know you have that. you said you have a small tumor on your liver which they think could be veins so i think it could very well be worth it to see a vein specialist or a hematologist if you havent already because you could get checked for polycythemia vera. best of luck