Table 1.

Summary of pathological findings

Histology
Neonatal gastric mucosa	n=2
Uninvolved gastric mucosa	n=17
Cancerous mucosa	n=31 (double cancer n=1, triple cancer n=1)
Differentiated adenocarcinoma	n=18	Undifferentiated adenocarcinoma	n=13
Papillary adenocarcinoma	n=5	Poorly differentiated adenocarcinoma	n=12
Tubular adenocarcinoma	n=13	Signet ring cell carcinoma	n=1

Clinicopathological findings	Differentiated adenocarcinoma	Undifferentiated adenocarcinoma	Total
Depth of invasion: MP, muscularis propria; SE, serosa exposed; SI, serosa infiltrating; SM, submucosa; SS, subserosa. Mode of infiltrative growth: INFα, the tumour shows expanding growth and a distinct border from the surrounding tissue; INFβ, this category is between INFα and INFγ; INFγ, the tumour shows infiltrating growth and an indistinct border from the surrounding tissue. Conclusive stage grouping: stage I, t1(M•SM)n0, t1n1, or t2 (MP•SS) no; stage II, t3(SE)no, t2n1, or t1n2; stage III, t4(SI)n0, t3n1, t4n1, t2n2, t3n2, t1n3, or t2n3; stage IV, t4n2, t3n3, or cases with direct invasion into surrounding organs, peritoneal dissemination, and/or liver metastasis.
Depth of invasion
SM	n=5	n=4	n=9
MP	n=4	n=1	n=5
SS	n=5	n=4	n=9
SE	n=3	n=4	n=7
SI	n=1	n=0	n=1
Mode of infiltrative growth
INFα	n=5	n=2	n=7
INFβ	n=12	n=4	n=16
INFγ	n=1	n=7	n=8
Lymph node metastasis
Present	n=10	n=6	n=16
Absent	n=6	n=6	n=12
Conclusive stage grouping
Stage I	n=7	n=6	n=13
Stage II	n=3	n=1	n=4
Stage III	n=5	n=4	n=9
Stage IV	n=1	n=1	n=2