Which type of lung cancer is more common and spreads slowly?

Non-Small Cell Lung Cancer (NSCLC) is indeed the most common type of lung cancer, accounting for about 85% of all lung cancer cases. NSCLC is characterized by a slower growth rate and a more gradual spread compared to other lung cancer types, particularly Small Cell Lung Cancer (SCLC), which tends to grow and metastasize much more quickly.

NSCLC encompasses several subtypes, including adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. Each of these subtypes may have varying growth patterns, but overall, NSCLC is generally less aggressive than other forms.

The slower progression of NSCLC allows for more treatment options and potentially better outcomes, especially if caught in earlier stages. This is in stark contrast to small cell lung cancer, which is more aggressive with a higher propensity for metastasis. Thus, when considering the characteristics of lung cancers in terms of their commonality and growth rates, Non-Small Cell Lung Cancer is the predominant variant that matches the criteria in the question.