Micucci, an Emmy-nominated actress, portrays “Lucy” on the Big Bang Theory television series. She’s also given life to “Scooby Doo” character Velma in recent years. However, her social media video has a more serious tone than usual. She’s seen in a hospital setting not long removed from lung cancer surgery.

“The greatest news is they caught it early and got it out,” she said.

She says she’s grateful her cancer was caught in its early stages, which is rare considering lung cancer’s subtle symptoms make it difficult to detect during its early stages when it is easier to treat.

“I’m all good,” Micucci said before optimistically claiming after a few weeks of rest, she’s “back at it.”

Smoking and Lung Cancer Risk

Lung cancer is the leading cause of cancer deaths for men and women in the United States. Nonsmokers still get lung cancer, but cigarette smoking is the number one risk factor for the disease. Tobacco smoke contains a mixture of more than 7,000 different chemicals, at least 70 of which are known to cause cancer, the CDC says.

The CDC says cigarette smoking is linked to about 80 to 90 percent of lung cancer deaths, and people who smoke cigarettes are 15 to 30 times more likely to get lung cancer or die from lung cancer than people who don’t smoke. Additionally, second-hand smoke can cause lung cancer.

WATCH: Smoking and Cancer Risk

Smoking is, of course, the primary cause of lung cancer, but nonsmokers can and do develop this disease. Researchers have made progress in understanding the differences between lung cancer in smokers versus nonsmokers, says Dr. Ronald Natale, a medical oncologist at Cedars-Sinai Medical Center, and they’re developing targeted treatments that will be able to address the genetic drivers of lung cancer in nonsmokers.

“Among patients who are nonsmokers, or former very light smokers, we identify a mutation that we can target with pills in about 60% to 70% of them. That leaves 30% or so, 40%, in whom we either have a target for which we do not have successful treatment,” Dr. Ronald Natale, a medical oncologist at Cedars-Sinai Medical Center, tells SurvivorNet.

“Among patients who are smokers, who have more complex cancers that have hundreds, sometimes thousands of mutations, don’t have a driver mutation that we can give a pill for, which is only a tiny percentage of lifelong smokers. Chemotherapy is the primary treatment in most patients,” Dr. Natale explains further.

Understanding Lung Cancer

Lung cancer forms when cancer cells develop in the tissues of the lung. It is the second most common form of cancer and the leading cause of cancer deaths in both men and women in the U.S., SurvivorNet experts say. It’s “completely asymptomatic,” says thoracic surgeon-in-chief at Temple University Health System Dr. Joseph Friedberg.

“It causes no issues until it has spread somewhere. So, if it spreads to the bones, it may cause pain. If it spreads to the brain, it may cause something not subtle, like a seizure,” Dr. Friedberg adds.

WATCH: Detecting lung cancer in the absence of symptoms.

Scans such as X-rays can help doctors determine if a shadow appears, which can prompt further testing for lung cancer.

Lung cancer often doesn’t cause symptoms until it has already spread outside the lungs, according to SurvivorNet’s experts.

There are two main types of lung cancer, which doctors group together based on how they act and how they’re treated:

• Non-small cell lung cancer (NSCLC) is the most common type and makes up about 85% of cases.
• Small cell lung cancer (SCLC) is less common, but it tends to grow faster than NSCLC and is treated very differently.

Some people with lung cancer may experience symptoms such as:

• A cough that doesn’t go away, that gets worse, or that brings up bloody phlegm
• Shortness of breath
• Fatigue
• Chest pain
• Hoarse voice
• Appetite loss
• Weight loss

If you are experiencing these kinds of symptoms consistently, contact your doctor for further tests.

Treatment options for lung cancer depend on its type, its location, and its staging. In general, treatment methods include surgery, chemotherapy, radiation therapy, targeted therapy, or a combination of any of these treatments.

How Molecular Testing Helps Lung Cancer Patients

Lung cancer treatment has seen notable progress partly because of molecular testing and profiling. This type of testing helps better understand specific genetic alterations and mutations that drive the growth, development, and progression of cancer cells. Some of these molecular characteristics can be targeted using precise and effective new therapies to improve patient outcomes. Ultimately, understanding the molecular profile of each person’s cancer allows oncologists to use customized and personalized treatments.

RELATED Next-Generation Sequencing in Lung Cancer

There are several next-generation sequencing (NGS) tests you may encounter, depending on where you are getting treatment and what you are getting treatment for. Here are some of the common ones currently on the market:

• FoundationOne®CDx looks at 324 genes in solid tumors and says results can take up to 12 days. Test results include microsatellite instability (MSI) and tumor mutational burden (TMB) to help inform immunotherapy decisions.
• OmniSeq Insight provides comprehensive genomic and immune profiling for all solid tumors. It looks for 523 different genes. Test results include microsatellite instability (MSI) and tumor mutational burden (TMB), as well as PD-L1 by immunohistochemistry (IHC).
• Cobas EGFR Mutation Test v2 identifies 42 mutations in exons 18, 19, 20, and 21 of the epidermal growth factor receptor (EGFR) gene. It is designed to test tissue and plasma specimens with a single kit, allowing labs to run tissue and plasma simultaneously on the same plate.

Questions for Your Doctor

If you find yourself diagnosed with lung cancer and are concerned about the long-term impacts, here are some questions you can ask your doctor.

• Has my cancer spread to other parts of the body?
• Based on my cancer stage, what are my treatment options?
• What are the side effects of my recommended treatment?
• Are there ways to help minimize the effects of treatment?
• How long will I be unable to work or carry out my daily activities?
• What financial resources are available to get the treatments I need?

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