“…In order to study the number of analyzed ganglia, the cohort value was established based on criteria of different surgeon associations, which recommend the analysis of at least 12 negative ganglia 41,46,47 . This way, it is possible to confirm with 90% accuracy that the patient is free of lymphatic invasion 38,48 . In one of the studies conduct- ed in Germany, it was defined that more than 75% of the surgeries should have more than 12 analyzed ganglia; in Spain, the value presented for such indicator is around 71% 22,38 .…”