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Back to Oncology Diseases

Non-small cell lung cancer

Three major types of tumors are included under the NSCLC category:


Adenocarcinoma is currently the most common type of NSCLC, accounting for approximately 40% of cases.

Adenocarcinoma is most likely to occur in nonsmokers or former smokers.

It is the most common tumor in women.

Usually presents as a small peripheral lesion that has a high propensity to metastasize to both regional lymph nodes and distant sites.

Because of the tendency of the primary tumor to occur in peripheral locations, it frequently produces no symptoms.

Bronchoalveolar adenocarcinoma

The incidence of the bronchoalveolar type of adenocarcinoma is increasing.

This tumor appears to rise from type 2 pneumocytes, and it may present as a pneumonic infiltrate, as multiple nodules scattered throughout the lungs, and, occasionally, as a single nodule.

Squamous cell tumors

Squamous cell tumors comprise approximately 30% of all cases of lung cancer.

Usually occur in a central location and tend to spread to regional lymph nodes; they are the most likely of all lung cancers to remain localized and to cavitate (15%-30% of patients die without evidence of distant metastases).

Large-cell carcinoma

Large-cell carcinoma accounts for approximately 10%-15% of all lung cancers.

It tends to be a relatively large peripheral lesion, and, like adenocarcinoma, it has a high propensity to metastasize to regional lymph nodes and distant sites.

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