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: Anatomy
Which of the following lymph nodes receive lymphatic drainage from testes? 
Select and explain. 
A. Internal iliac LN, B. Para aoic LN, C. Superior inguinal LN, D. Deep inguinal LN
B: Para aoic LN
Answer: B: Para aoic LN 
Explanation: Testicular lymphatics drain into the retroperitoneal lymph nodes; the right primarily into the interaoocaval area, the left into the para-aoic area, both just below the renal vessels. Lymph nodes of the testis extend from T1 to L4 but are concentrated at the level of the renal hilum because of their common embryologic origin with the kidney. Ref: Cooper C.S., Joudi F.N., Williams R.D. (2010). Chapter 38. Urology. In G.M. Dohey (Ed), CURRENT Diagnosis & Treatment: Surgery, 13e.