This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
What is epicolic node ? 
Select and explain. 
A. Node draining colon, B. Adjacent to aorta, C. Epitracheal node, D. None
A: Node draining colon
Answer: A: Node draining colon 
Explanation: • Lymphatic drainage also follows the arterial anatomy.
• Lymphatics from the colon and proximal two thirds of the rectum ultimately drain into the para-aortic nodal chain, which empties into the cisterna chyli.
• Superior and inferior mesenteric nodes are part of Pre-aortic group of lymph nodes.
• Lymphatics draining the distal rectum and anal canal may drain either to the para-aortic nodes or laterally, through the internal iliac system, to the superficial inguinal nodal basin (dentate line roughly marks the level where lymphatic drainage diverges).
• Lymph nodes are commonly grouped into levels depending on their location.