Question

a pancoast tumor most commonly arises from which location?
please select your answer...
a lower lobe of the lung
b apex of the lung involving the superior pulmonary sulcus
c middle mediastinum
d parietal pleura of the lower chest wall

Explanation:

Pancoast tumors are tumors that arise in the apex of the lung and involve the superior pulmonary sulcus. This location is characteristic of Pancoast tumors. The lower lobe of the lung (Option A) is not the typical site. The middle mediastinum (Option C) is not where Pancoast tumors originate. The parietal pleura of the lower chest wall (Option D) is also an incorrect location.

Answer:

B. Apex of the lung involving the superior pulmonary sulcus