The difference between incision and excision of lymph nodes is very simple. The incision of a lymph node is when the biopsy only takes part of the lymph node during surgery. The excision of the lymph node is when the whole lymph node is removed.
It depends as to which organ drainage the lymph node has. If there is only one lymph node needed say for histological test or biopsy only one incision is fine. But i think, generally it takes only one incision.
Method and location
Lymphadenectomy is the medical term meaning surgical removal of a lymph node.
Lymph and plasma are basically the same substance but it changes names depending on location.
when lymph fluid is contained inside lymph vessels or lymph node(lymphatic system) it is called lymph whereas when it is squeezed out of cells b/w the cell membranes it is called tissue fluid
Serum is in the blood vessels (circulating blood). Lymph is the plasma that diffuses through the arteries (used to be part of the blood) into the lymph system. Once it flows through the lymph system, it will rejoin with blood through veins.
Lymph Node is the node of the blood plasma which is a colourless fluid whereas Spleen is the connective fibre present in the blood clot.
The pectoral lymph nodes are also known as the anterior group and can be found just inferior to the pectoralis minor muscle, the cephalic nodes are also known as deltopectoral lymph nodes and they receive lymph from the superficial vessels only
Lymph is mainly leakage from blood vessels, thus it is almost identical EXCEPT for the absence of Red Blood cells.
A limited or modified lymphadenectomy removes only some of the lymph nodes in the area around a tumor; a total or radical lymphadenectomy removes all of the lymph nodes in the area.
Interstitial fluid
Absorption is where nutrients are moved from the lumen in to the bloodstream or the lymph. here they are transported to tissues where they are assimilated :used for energy, growth etc