All regarding bronchial cyst are true Except
**Core Concept**
Bronchial cysts, also known as bronchogenic cysts, are congenital anomalies that arise from the abnormal budding of the foregut or tracheobronchial tree during embryonic development. These cysts typically contain fluid or semi-solid material and can be found along the tracheobronchial tree, often presenting as a mass in the mediastinum or lung.
**Why the Correct Answer is Right**
Bronchial cysts are typically lined by ciliated pseudostratified columnar epithelium, which is similar to the epithelium found in the tracheobronchial tree. The cysts can be filled with a serous or mucoid fluid, and their walls may contain cartilaginous or connective tissue. Bronchial cysts are often found incidentally on imaging studies, but they can also cause symptoms such as cough, wheezing, or chest pain.
**Why Each Wrong Option is Incorrect**
**Option A:** Bronchial cysts are not typically associated with malignancy. While rare, some bronchial cysts can undergo malignant transformation, but this is not a common feature of these lesions.
**Option B:** Bronchial cysts can be found in any age group, but they are most commonly diagnosed in children and young adults. While it is true that bronchial cysts can occur at any age, they are indeed more common in younger individuals.
**Option C:** Bronchial cysts are not typically associated with infection. While bronchial cysts can become infected, this is a rare complication and not a characteristic feature of these lesions.
**Clinical Pearl / High-Yield Fact**
Bronchial cysts can be confused with other mediastinal or lung masses, such as lymph nodes, thymic cysts, or lung tumors. Therefore, a thorough diagnostic evaluation, including imaging studies and histopathological examination, is essential for accurate diagnosis and management.
**Correct Answer: C. Bronchial cysts are not typically associated with malignancy.