Lingular atelectasis and lung cancer relationship?

The lingula is the: Smallest lung segment on the left side. Atelectasis means collapse. A central lung cancer could obstruct the airway and lead to collapse.

Depends: Is the lung cancer also in the lingula sometimes the cancer plugs the airway and causes distal collapse(atelectasis) also pneumonia, cancer and atelectasis are part of COPD due to smoking.