Commonest stomach tumour which bleeds –
**Core Concept**
The commonest stomach tumour that bleeds is a type of gastric malignancy that originates from the mucosal lining of the stomach. This tumour type is characterized by its aggressive growth pattern, which can lead to ulceration and bleeding.
**Why the Correct Answer is Right**
The correct answer is a gastric carcinoma, specifically a type of adenocarcinoma that arises from the glandular epithelium of the stomach. The tumour's growth can lead to the formation of ulcers, which are prone to bleeding due to the erosion of the mucosal lining and the disruption of the normal protective mechanisms of the stomach. The bleeding can be caused by the tumour's invasion into the deeper layers of the stomach wall, leading to the formation of a gastric ulcer that bleeds easily.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because gastric carcinoids, a type of neuroendocrine tumour, are less likely to bleed compared to gastric adenocarcinomas. While they can cause bleeding, it is less common.
**Option B:** This option is incorrect because leiomyomas, a type of smooth muscle tumour, are rare and usually benign, making them less likely to cause significant bleeding.
**Option C:** This option is incorrect because gastrointestinal stromal tumours (GISTs) can cause bleeding, but they are less common than gastric adenocarcinomas and are typically found in the stomach or small intestine.
**Clinical Pearl / High-Yield Fact**
Gastric adenocarcinomas can be associated with a history of chronic gastritis, particularly with Helicobacter pylori infection, which is a known risk factor for the development of gastric cancer.
**Correct Answer: D. Gastric Adenocarcinoma.**