Does a blood test detect lymphatic diseases like problems with lymphatic flow?

Usually mechanical: The commonest reasons for interruption of lymphatic flow are surgical, like lymph node removal for breast cancer. When the lymph nodes are cut out of the underarm area, the lymph channels are cut with them, leaving the arm on that side vulnerable to "lymphedema." this is why women do not have blood drawn on the side where they had a mastectomy. There is no blood test for this.

None: For now you can do a body impedance analysis to calculate water weight - but no blood test.