Moderately magnified microphotograph of a haematoxylin-eosin (HE)-stained section of a deeper cut of the number 9b slice in the post-ESD specimen revealed that the LG-tub1 tumour was adjacent to a HG-tub2-por2 tumour in this single LG-tub1 > HG-tub2-por2 lesion. Here, GDF15 is linked to neoplasm.