Which assessment finding is the most indicative of lung cancer in a client?

A persistent cough that worsens over time is highly indicative of lung cancer, as it is a common symptom experienced by individuals with this condition. In lung cancer cases, the cough may start as a minor irritation but gradually becomes more pronounced and may be accompanied by other symptoms, such as hemoptysis (coughing up blood), changes in the voice, or discomfort in the chest. This worsening cough can result from the presence of a tumor obstructing airways or irritating lung tissue.

Clear lung sounds on auscultation typically suggest that there is no fluid accumulation or blockage in the airways, which is not consistent with the presence of lung cancer. Recent weight gain and increased energy levels generally do not align with the typical presentation of lung cancer, especially since patients often experience weight loss and fatigue as the disease progresses. Thus, the presence of a worsening persistent cough stands out as a significant indicator of lung cancer that warrants further investigation.