The Main Types of Lung Cancer

Non-small cell lung cancer includes adenocarcinoma, squamous cell carcinoma and large cell carcinoma. Small cell lung cancer tends to grow and spread differently, so clinicians use a distinct approach to staging and selecting treatment.

The type describes how cancer cells look and behave under laboratory examination. Adenocarcinoma develops from gland-forming cells, while squamous cell carcinoma arises from flat cells lining the airways. The label helps narrow treatment choices but does not provide the whole plan.

Stage, tumour location, lung function, general health and molecular features also matter. Genomic tumour profiling can look for changes that may be matched with certain medicines in suitable non-small cell tumours. Results are interpreted alongside the pathology report rather than in isolation.

The team usually needs cells or tissue from the suspicious area to identify the cancer type. The sampling method depends on where the tumour sits and may involve a bronchoscopy, a needle guided by imaging, or another procedure chosen for safe access.

Once pathology and staging information are available, specialists can discuss options such as surgery for an operable tumour, radiotherapy, chemotherapy, immunotherapy or targeted medicine. Bring a medicines list and relevant medical history, and ask for plain-language copies of the scan and pathology findings.

The cancer type does not determine whether a symptom is an emergency. Seek urgent help for severe breathing difficulty, coughing up a significant amount of blood, sudden intense chest pain, collapse or lips turning blue or grey.

Emergency assessment is also appropriate for a new seizure, sudden one-sided weakness, marked confusion or a severe unfamiliar headache. These red flags need attention even while biopsy or staging results are pending.

Ask for the exact cell type, whether the sample was adequate, which molecular or immune-marker tests are relevant, and how the stage was determined. You can also ask which findings drive the recommended treatment, what alternatives exist, and whether the plan aims to remove, control or relieve effects of the cancer.