Clinicopathological characteristics and prognosis of 232 patients with poorly differentiated gastric neuroendocrine neoplasms

Figure 1 Endoscopic detection of poorly differentiated gastric neuroendocrine neoplasms. A: Circumferential raised lesions on the cardia with uneven surfaces; B: Irregular bumps on the side of the minor curvature of the cardia, accompanied by erosions, ulcers, and unclear boundaries that bled easily when contacted; C: A raised ulcer with a diameter of 4 cm was observed in the small curvature of the antrum; D: A deep ulcer with a diameter of approximately 0.5 cm on the posterior wall of the gastric fundus was observed, and the base was not clear.