4320
METHODS : Primary lung cancers ( n = 269 ) and non neoplastic lung tissue ( n = 35 ) were tested for LDH5 expression by immunohistochemistry using a polyclonal LDH5 antibody ( ab53010 ) .
 Primary lung cancers, non neoplastic lung tissue
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Primary lung cancers, non neoplastic lung tissue