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In this report , we analyzed the expression of Plexin C1 using immunohistochemistry on sections of primary and matched metastatic lesions from 19 subjects and in a large melanoma tumor microarray .
 sections, primary, metastatic lesions, melanoma tumor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 sections, primary, metastatic lesions, melanoma tumor