Which test can confirm lung cancer at age 40?

Question

Hello doctor,

I am a 40-year-old male, weighing approximately 158.7 pounds. About eight months ago, I began experiencing a persistent dry cough, chest tightness, and occasionally noticed small streaks of blood when coughing. After undergoing several medical evaluations and tests, I was eventually diagnosed with lung cancer.

The investigations I underwent included a chest X-ray, which showed a suspicious shadow; a CT scan that identified a 3 cm mass in my right lung; and a bronchoscopy with biopsy. Because there were multiple tests involved, I am still trying to better understand the diagnostic process.

Could you please explain which test ultimately confirmed the diagnosis of lung cancer and why the other scans and procedures were necessary?

I would greatly appreciate your guidance.

Thank you for your time.

Answer 1

Hello,

Welcome to icliniq.com

Thank you for your question.

I wish you good health and a smooth recovery.

It is important to understand that several tests are often required before we can reach a final diagnosis and develop the most appropriate treatment plan. While the diagnosis itself may seem straightforward once confirmed, additional testing helps us determine the exact type of cancer, its characteristics, and how it may respond to different treatments.

Among all the investigations you underwent, the biopsy is the test that definitively confirms the diagnosis of lung cancer. A biopsy allows us to examine the tissue under a microscope and identify the exact type of cancer cells present.

The CT (computed tomography) scan and other imaging examinations are important, also, since they assist us in seeing how much disease there is and whether the cancer has spread to other parts of the body. This data helps to determine the stage of cancer, which is an important part in deciding on the right treatment.

Treatment recommendations vary depending on the stage of the disease:

Stage I is often managed primarily with surgery, followed by regular monitoring and follow-up.
Stages III and IV may require treatments such as chemotherapy, targeted therapy, immunotherapy, or a combination of these approaches, depending on the cancer type and its molecular characteristics.

This is why multiple tests are necessary; they provide different but equally important pieces of information that guide diagnosis, staging, and treatment planning.

The recommended investigations are as follows

Biopsy (diagnostic confirmation).
Molecular testing (to identify genetic mutations and guide targeted therapies).
PET-CT scan (to assess the extent of disease spread).

The treatment plan is determined according to the cancer stage and biopsy/molecular test results.

Follow-up appointment in seven days to review results and finalize the treatment plan.

Please remain patient throughout this process. Once all necessary information is available, we will be able to determine the disease stage and recommend the most appropriate treatment for you.

If you have any further questions, please do not hesitate to ask.

I wish you a speedy recovery.

Thank you.