PAEA Surgery End Of Rotation (EOR) Practice Exam

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Where does bronchogenic carcinoma most frequently occur in the lungs?

Left lower lobe
Right lower lobe
Right upper lobe
Left upper lobe

The correct answer is: Right upper lobe

Bronchogenic carcinoma, which is the most common type of lung cancer, has a predilection for specific locations within the lungs. The right upper lobe is the most frequently affected area. This preference can be attributed to several factors, including the anatomical differences in the bronchial tree and the position of the lungs. The right main bronchus is wider and more vertically oriented than the left, leading to more direct airflow and a higher likelihood of cancerous cells settling in this lobe. Understanding the reasons behind the specific location helps recognize that while lung cancer can occur in any lobe, certain subdivisions have a higher incidence based on airflow patterns and exposure to carcinogens, such as tobacco smoke. Thus, the right upper lobe emerges as the most common site for the development of bronchogenic carcinoma, making it the correct choice in this scenario.