This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Pathology
[{'content': 'Early gastric carcinoma indicated by \nSelect and explain. \nA. A lesion confined to the mucosa and sub mucosa, B. A lesion confined to sub mucosa and muscular wall, C. Cauliflower growth projecting in to the lumen, D. "Linitis plastica" appearance in stomach wall', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. (A lesion confined to the mucosa and sub mucosa) (598 - Basic - pathology 8th) (570- Harsh mohan 5th) (598-Basic-pathology 8th) EARLY GASTRIC CARCINOMA - defined as a lesion confined to the mucosa and submucosa, regardless of the presence or absence of perigastric lymphnode metastasis ADVANCED GASTRIC CARCINOMA - a neoplasm that has extended below the submucosa into the muscular wall**Ulcerative carcinoma is the most common pattern of advanced carcinoma* Scirrhous carcinoma of stomach - stomach wall is thickened due to extensive desmoplasia giving the appearance as "leather - bottle stomach" or linitis plasticcT. The lumen of the stomach is reduced there are no ulcers but rugae are prominent* Stomach reveal fat- laden cells - seen in post gastrectomy* Watermelon stomach is seen in Scleroderma.', 'role': 'assistant'}]