Remnant gastric cancer: An ordinary primary adenocarcinoma or a tumor with its own pattern?

Table 2 Pathological characteristics of primary proximal gastric cancer and remnant gastric cancer groups

Variables	PGC, n = 120 (%)	RGC, n = 41 (%)	P value
Tumor size, mean ± SD	5.1 (3.4)	5.3 (3.4)	0.785
Lauren type			0.302
Intestinal	68 (56.7)	27 (65.9)
Diffuse/mixed	52 (43.3)	14 (34.1)
Grade of histological differentiation			0.256
Well/moderately differentiated	55 (45.8)	23 (56.1)
Poorly differentiated	65 (54.2)	18 (43.9)
Lymphatic invasion			0.484
No	51 (42.5)	20 (48.8)
Yes	69 (57.5)	21 (51.2)
Venous invasion			0.069
No	75 (62.5)	32 (78)
Yes	45 (37.5)	9 (22)
Perineural invasion			0.602
No	50 (41.7)	19 (46.3)
Yes	70 (58.3)	22 (53.7)
pT			0.842
pT1/T2	46 (38.3)	15 (36.6)
pT3/T4	74 (61.7)	26 (63.4)
Number of resected LNs, mean ± SD	43.2 (20.8)	26 (14)	< 0.001
LN metastasis			0.204
pN0	45 (37.5)	20 (48.8)
pN+	75 (62.5)	21 (51.2)
Lymph node ratio			0.915
LR0	76 (63.3)	25 (61)
LR1	21 (17.5)	9 (22)
LR2	11 (9.2)	4 (9.8)
LR3	12 (10)	3 (7.3)
pTNM			0.773
I	36 (30)	13 (31.7)
II	27 (22.5)	11 (28.8)
III	57 (47.5)	17 (41.5)
Adjuvant chemotherapy			< 0.001
No	45 (37.5)	29 (70.7)
Yes	71 (62.5)	12 (29.3)
Recurrence			0.607
No	87 (72.5)	28 (68.3)
Yes	33 (27.5)	13 (31.7)
Pattern of recurrence1			0.322
Locoregional	11 (33.3)	5 (38.5)
Distant	12 (36.4)	5 (38.5)
Peritoneal	14 (42.4)	8 (61.5)

¹Patient can have more than one site of recurrence. P values in bold are statistically significant. PGC: Proximal gastric cancer; pTNM: Pathological tumor-node-metastasis; RGC: Remnant gastric cancer; LN: Lymph node; SD: Standard deviation.