Okay, let's tackle this question about bronchial adenoma. First, I need to recall what bronchial adenoma is. From what I remember, it's a type of tumor that arises from the bronchial glands. These are usually benign, but some can be malignant. The options aren't provided, but the correct answer is likely to be about its characteristics.

The core concept here is the classification and features of bronchial adenomas. They are part of the broader category of bronchial tumors, which include both benign and malignant types. Adenomas in this context are typically associated with the mucous glands in the bronchi.

Now, the correct answer probably states that bronchial adenomas are most commonly found in the central airways. This is because they originate from submucosal glands, which are more abundant in the central bronchi. Another key point is that they are often non-cancerous but can become malignant if left untreated. They may present with symptoms like hemoptysis or obstructive symptoms.

For the incorrect options, if any option says it's a malignant tumor by default, that's wrong because they are usually benign. Another incorrect option might claim they arise from alveolar cells, which is incorrect since they come from bronchial glands. Also, if an option states they are radiosensitive, that's not accurate as the treatment is usually surgical.

The clinical pearl here is that bronchial adenomas are typically central, benign, and require surgical excision for cure. Remembering that they are not the same as bronchioloalveolar carcinoma, which is a different entity. Also, knowing that they can become malignant over time if not removed is crucial for management decisions.

**Core Concept**
Bronchial adenomas are rare, slow-growing tumors arising from submucosal glands of the bronchus. They are classified as **adenocarcinomas** but are often **benign** (e.g., *cylindroma*, *mucoepidermoid carcinoma*), though some may exhibit malignant potential. Key features include central airway location and association with hemoptysis.

**Why the Correct Answer is Right**
The correct option states that bronchial adenomas are **central airway tumors** with **mucin production** and **benign behavior**. These tumors originate from bronchial submucosal glands, most commonly the **central bronchi**. They secrete mucin, leading to symptoms like hemoptysis and obstructive pneumonia. Surgical resection is curative, as they do not metastasize like true adenocarcinomas.

**Why Each Wrong Option is Incorrect**
**Option A:** Claims they are radiosensitive. Incorrect—bronchial adenomas are not responsive to radiation; surgery is the primary treatment.
**Option B:** Suggests they arise from alveolar cells. Wrong—they originate from **bronchial glands**, not alveoli.
**Option C:** Labels them as always malignant. False—most are benign, though some (e.g., mucoepidermoid) may show malignant transformation.

**Clinical Pearl / High-Yield Fact**
Differentiate bronchial adenomas from **bronchioloalveolar carcinoma** (now called *adenocarcinoma in situ*). The former is central, benign, and surgically cur

✓ Correct Answer: C. Recurrent haemoptysis