Clinicopathologic characteristics and resection rates of papillary early gastric cancer removed by endoscopic submucosal dissection.

The aim of this study was to assess the: 1) clinicopathologic features of papillary early gastric cancer (PEGC) (13 cases) compared to tubular early gastric cancer (TEGC) (41 cases); 2) efficiency of endoscopic submucosal dissection (ESD) in treatment of PEGC. From January 2007 to February 2016, a total of 54 consecutive patients with early gastric cancer (EGC) underwent ESD at the Department of Gastroenterology of the Pomeranian Medical University in Poland. The histologic type of carcinoma was assessed according to the WHO histological classification of GC. The extension of GC into the submucosa was measured using the Aperio Scan Scope image analysis system tools. PEGCs were diagnosed in 24.1% of the cases of EGC. PEGCs were significantly more elevated in macroscopic examination and better demarcated tumors than TEGC. There were no significant differences between gender, tumor location, ulceration, tumor size, depth of invasion (T), presence of intestinal metaplasia and lymphocytic infiltrate. Curative resection was achieved in 87.1% of patients with EGCs treated with ESD. The lower rate of curative resection (R0) observed in PEGC (76.9%) vs TEGC (90.2%) was not statistically significant. Further studies will be necessary to confirm the clinical and morphological presentation of PEGCs.