Undifferentiated-type gastric adenocarcinoma: prognostic impact of three histological types

• Published in: World journal of surgical oncology Vol. 10; no. 1; p. 254
• Main Authors: Lee, Han Hong, Song, Kyo Young, Park, Cho Hyun, Jeon, Hae Myung
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 26.11.2012; BioMed Central; BMC
• Subjects: Adenocarcinoma; Adenocarcinoma, Mucinous - mortality; Adenocarcinoma, Mucinous - pathology; Adenocarcinoma, Mucinous - surgery; Adult; Aged; Analysis; Carcinoma, Signet Ring Cell - mortality; Carcinoma, Signet Ring Cell - pathology; Carcinoma, Signet Ring Cell - surgery; Chemotherapy; Classification; Cohort Studies; Disease-Free Survival; Female; Gastrectomy; Gastric cancer; Health aspects; Histology; Hospitals; Humans; Male; Metastasis; Middle Aged; Mucinous adenocarcinoma; Multivariate analysis; Neoplasm Invasiveness; Neoplasm Staging; Predictive Value of Tests; Prognosis; Signet ring cell carcinoma; Stomach cancer; Stomach neoplasms; Stomach Neoplasms - mortality; Stomach Neoplasms - pathology; Stomach Neoplasms - surgery; Studies; Surgery; Survival analysis; Survival Rate; Tomography; Tubular adenocarcinoma
• ISSN: 1477-7819; 1477-7819
• DOI: 10.1186/1477-7819-10-254

The prognostic value of the three constituents of undifferentiated-type gastric adenocarcinoma remains unclear. The present study assessed the clinicopathological characteristics and prognosis of undifferentiated-type mucinous adenocarcinoma (uMAC) and signet ring cell carcinoma (SRC) compared with those of poorly differentiated adenocarcinoma (PDAC). In total, 1,376 patients with undifferentiated-type gastric adenocarcinoma were included, consisting of 1,002 patients diagnosed with PDAC, 54 with uMAC and 320 with SRC. Clinicopathological factors and survival rates were compared among the three histological types. Significant differences in the distribution of pathological stages were observed among the groups. Patients with SRC had a significantly better survival rate than those with PDAC or uMAC, in both the all patients including non-curative resected patients and curative-resected groups. In addition, there was significant difference in survival between the PDAC and uMAC groups. Multivariate analysis suggested that age, gender, tumor depth, lymph node metastasis and curability significantly affected survival. Histological type was not an independent prognostic factor. There was no significant difference in the pattern of recurrence among the three groups. The uMAC and SRC had worse and favorable prognosis compared with PDCA, respectively. However, there were no differences in survival by pathological stage, thus histological type was not an independent predictor of prognosis.