Intra‐arterial methylene blue injection into <i>ex vivo</i> colorectal cancer specimens improves lymph node staging accuracy: a randomized controlled trial

Abstract

Ex vivo intra-arterial methylene blue injection increases lymph node yield and can help to reduce the number of cases with a lower-than-recommended number of nodes, particularly in patients with rectal cancer having neoadjuvant treatment. The technique is easy to perform, cheap and saves time.