Whether you’re waiting for test results or supporting a loved one, knowing what to expect can ease anxiety and help you feel more in control. We understand how overwhelming the thought of a lung cancer diagnosis can feel.  This guide explains how doctors test for and diagnose lung cancer, from simple X-rays to more advanced procedures like biopsies. We believe in empowering you with clear, compassionate information to help you navigate every step of your journey.

Why Early Lung Cancer Testing Matters

Early detection saves lives. When lung cancer is found in its early stages, treatment options are more effective, and survival rates improve. Unfortunately, many people don’t experience noticeable symptoms until cancer has progressed. Common symptoms for either non-small cell (NSCLC) or small cell lung cancer (SCLC) include1:
  • Persistent cough
  • Shortness of breath
  • Chest pain
  • Unexplained weight loss
  • Fatigue
If you’re at high risk, especially if you’re a current or former smoker, talk to your doctor about lung cancer screening using a low-dose CT scan. Being proactive about your health can change your outcome, and our team is here to guide and support you, whether you’re newly diagnosed or seeking preventative care. Your health is our priority. Contact us!

How Do Doctors Test for Lung Cancer? Understanding the Basics

When it comes to diagnosing lung cancer, doctors rely on several different types of tests. Each one offers important clues that help your care team understand what’s happening inside your body.

Why Early Detection Matters

Catching lung cancer early can make a big difference. The earlier it’s found, the more treatment options are usually available, and the better the chances of slowing cancer’s spread. That’s why knowing how lung cancer is tested can help you feel empowered to seek care sooner.

Key Diagnostic Tools Doctors Use

Chest X-rays

A chest X-ray is often the first imaging test doctors use to check for lung cancer. This quick procedure creates pictures of the lungs to detect suspicious masses or abnormal areas. While an X-ray can’t confirm cancer, it can help your doctor spot something unusual that needs further investigation.

CT Scans and Low-Dose CT

A CT scan (computed tomography scan) uses X-rays to produce detailed images of your chest. A low-dose CT scan is often recommended for lung cancer screening, especially in people at higher risk, such as those with a history of smoking. CT scans help:
  • Detect smaller tumors that X-rays might miss
  • Evaluate the size and location of lung abnormalities
  • Check if cancer has spread to nearby lymph nodes

PET Scans and MRI

PET scans (positron emission tomography) and MRI (magnetic resonance imaging) provide additional imaging to detect active cancer cells and determine how far the disease has spread. Doctors often use these scans to evaluate areas that a CT scan can’t fully assess.

Ultrasound

Ultrasound imaging can help doctors guide biopsy needles to specific lymph nodes or masses, especially when examining areas near the chest wall. Each of these imaging techniques provides different pieces of the puzzle, helping your care team form a clear picture of your health.

Biopsies and Tissue Samples

A biopsy is usually required to confirm a lung cancer diagnosis. This involves collecting a tissue sample from the lung or nearby lymph nodes to check for cancer cells under a microscope. Different biopsy methods include:
  • Bronchoscopy – A thin, flexible tube (bronchoscope) is inserted into the airways to collect tissue.
  • Needle biopsy – A thin needle is guided through the chest wall using imaging to remove a small tissue sample.
  • Surgical biopsy – Sometimes surgery is needed to remove a larger sample or entire tumor for analysis.
Although hearing the word “biopsy” can feel intimidating, many procedures are minimally invasive and offer essential information for determining your best care plan.

Blood Tests and Biomarkers: Do Blood Tests Detect Lung Cancer?

One common question we hear is, “Can a blood test diagnose lung cancer?” The simple answer is: not directly—but blood tests do play an important supporting role.

How Blood Tests Help:

  • Tumor Markers – While there’s no single blood test that diagnoses lung cancer, certain tumor markers (substances made by cancer cells) can help guide doctors. These include markers like CA-125.2
  • Genetic Testing – After a lung cancer diagnosis, blood tests may help identify genetic mutations in cancer cells. This information can help personalize treatment plans.
  • General Health Monitoring – Blood tests check how well organs are working, detect infections, and assess overall health before starting treatment.
At ITC, we believe in looking at the whole person, not just the disease. Blood work helps us understand your unique body, so we can tailor gentle, non-toxic therapies to support your immune system during care.

What Happens During Lung Cancer Testing?

When you visit your healthcare provider for lung cancer testing, they’ll likely recommend a series of steps depending on your symptoms, risk factors, and any imaging results. Here’s what you can typically expect1:
  1. Initial Imaging Tests – Your doctor may start with a chest X-ray or CT scan to look for abnormalities in your lungs.
  2. Advanced Imaging – If suspicious areas appear, you might undergo a PET scan, MRI, or low-dose CT scan for a closer look.
  3. Blood Tests – These help assess your general health and look for cancer-related markers.
  4. Biopsy Procedures – If imaging suggests a possible tumor, your doctor will collect a tissue sample via bronchoscopy, needle biopsy, or surgery.
  5. Staging Tests – Once cancer is confirmed, additional imaging may help determine the stage, guiding treatment recommendations.
Throughout this process, your care team will explain every step and answer any questions.

How Do Doctors Stage Lung Cancer After Testing?

Staging helps doctors understand how far lung cancer has progressed. Knowing the stage of your cancer helps determine which treatment options are appropriate. Staging tests may include2:
  • CT scans to check lymph nodes and nearby structures
  • PET scans to identify cancer spread (metastasis)
  • MRIs to detect cancer in the brain or spine
  • Bone scans if bone spread is suspected
Lung cancer is usually staged as3:
  • Stage 1 –  Cancer is small and localized to the lung.
  • Stage 2 or 3 – Cancer has spread to nearby lymph nodes or tissues.
  • Stage 4 – Cancer has spread (metastasized) to distant organs.
At ITC, we understand the emotional weight of hearing your cancer stage. That’s why our team focuses on compassionate care and personalized, holistic treatment plans, no matter the stage.

How Holistic Therapies Can Support You During Diagnosis

Waiting for test results or undergoing multiple procedures can be physically and emotionally draining. We offer alternative therapies that help support your body during this diagnostic phase.

Our Focus Includes:

  • Supporting your immune system
  • Reducing inflammation naturally
  • Boosting circulation and oxygen flow to your tissues
  • Helping manage stress and fatigue
Overall, we treat you as a whole person—not just your diagnosis. That’s why many people turn to us for compassionate, natural support alongside conventional tests and treatments.

Supporting Your Diagnosis Journey: ITC’s Natural Approach

A lung cancer diagnosis can feel overwhelming, but you’re not alone. We focus on empowering your body’s natural healing abilities. Our alternative therapies aim to strengthen your immune system, reduce treatment side effects, and support your overall wellness, whether you’re undergoing testing, awaiting results, or actively pursuing treatment. Our natural therapies include:

Ready to Take the Next Step with ITC?

Learning how lung cancer is tested can feel overwhelming, but you’re not alone. Every scan, every test, and every conversation is a step toward understanding your health—and finding a care path that feels right for you. We’re ready to help you explore gentle, personalized options that work with your body’s natural healing abilities. Whether you’ve just started tests or already have a diagnosis, we’re here to listen, guide, and support you every step of the way. If you’re ready to learn more about natural cancer treatments and immune-boosting care, contact ITC today for a free consultation.   Written By: Dr. Adolfo Carrillo Dr. Adolfo Carrillo is a Board Certified Medical Doctor from Universidad Autónoma de Baja California. Dr. Carrillo has been collaborating with Dr. Bautista for over 5 years as a treating physician at the Immunity the Immunity Therapy Center. Dr. Carrillo is a charismatic Doctor whose knowledge and commitment to patient care and bringing healing to patients is a valuable asset to our center.   Sources:
  1. Cleveland Clinic. (2022). Small Cell Lung Cancer. https://my.clevelandclinic.org/health/diseases/6202-small-cell-lung-cancer
  2. Cleveland Clinic. (2024).  Blood Tests for Cancer. https://my.clevelandclinic.org/health/diagnostics/22338-blood-tests-for-cancer
  3. Cleveland Clinic. (2022). Lung Cancer. https://my.clevelandclinic.org/health/diseases/4375-lung-cancer
  4. American Cancer Society. Tests for Lung Cancer. https://www.cancer.org/cancer/types/lung-cancer/detection-diagnosis-staging/how-diagnosed.html
  5. WebMD. Natural and Alternative Treatments for Lung Cancer.  ​​https://www.webmd.com/lung-cancer/lung-cancer-alternative-treatments
  6. NIH. Natural Products with Activity against Lung Cancer: A Review Focusing on the Tumor Microenvironment. https://pmc.ncbi.nlm.nih.gov/articles/PMC8509218/