Barrett’s oesophagus shows
**Core Concept**
Barrett's oesophagus is a pre-malignant condition characterized by the replacement of the normal squamous epithelium of the oesophagus with metaplastic columnar epithelium, often in response to chronic gastroesophageal reflux disease (GERD). This metaplastic change increases the risk of oesophageal adenocarcinoma.
**Why the Correct Answer is Right**
The correct answer is related to the histopathological features of Barrett's oesophagus. The condition is characterized by the presence of goblet cells, which are a type of cell that produces mucin and is typically found in the colon. The presence of goblet cells in the oesophagus is a hallmark of Barrett's oesophagus and distinguishes it from other types of oesophageal pathology. The goblet cells are usually found in the distal third of the oesophagus and are often accompanied by intestinal metaplasia, which is the transformation of the normal oesophageal epithelium into a type of epithelium that is more similar to the epithelium of the intestine.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the histopathological features of Barrett's oesophagus.
* **Option B:** This option is incorrect because Barrett's oesophagus is not typically characterized by the presence of ulceration.
* **Option C:** This option is incorrect because Barrett's oesophagus is not typically characterized by the presence of Candida.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that Barrett's oesophagus is a pre-malignant condition, and patients with this condition are at increased risk of developing oesophageal adenocarcinoma. Regular endoscopic surveillance is recommended for patients with Barrett's oesophagus to detect early signs of cancer.
**Correct Answer:** D.