Why did my sleep apnea test lead to a lung cancer diagnosis?

Question

Hello doctor,

I am 67 years old, and I went to my doctor last year because of loud snoring and daytime fatigue that my wife had been complaining about for years. I was referred for a sleep study to investigate suspected obstructive sleep apnea, and as part of the workup, they performed a chest CT scan to look at my airways.

I was completely unprepared for what that scan revealed: a suspicious mass in my right lung that had absolutely nothing to do with why I was there. I have since been diagnosed with lung cancer, and I keep thinking about how I only found out because of a snoring problem. It feels surreal, and I am still trying to make sense of how this happened.

Why did a sleep apnea test lead to lung cancer at 67?
Is it medically common for chest imaging done during a sleep apnea workup to incidentally detect lung cancer?
How often does this kind of accidental discovery happen in older patients?
Does finding lung cancer this way, without any respiratory symptoms, typically mean it is caught at an earlier and more treatable stage than it otherwise would have been?

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

What you experienced can certainly feel surprising and even unsettling, but medically, it does happen from time to time. When patients like you are evaluated for suspected obstructive sleep apnea, doctors sometimes request imaging studies such as a chest computed tomography scan to look at the airways, lungs, or surrounding structures.

The scan is usually done to better understand breathing-related anatomy, but because a CT scan is used shows the entire chest in great detail, it can occasionally reveal findings that were not the original reason for the test. In medicine, these are called incidental findings.

In people in their 60’s or older like you, it is not uncommon for lung nodules or masses to be discovered incidentally during imaging performed for completely different reasons. With the increased use of computed tomography scans over the past several years, doctors are detecting more of these unexpected findings. Some patients, like you, first learn about a lung abnormality during scans done for:

Heart evaluation.
Trauma assessment.
Other unrelated investigations.
Breathing or sleep-related studies.

The important point for you is that cancers found in this way are often discovered before they begin causing symptoms such as:

Persistent cough.
Chest pain.
Weight loss.
Shortness of breath.

When lung cancer is detected before symptoms develop, there is a greater possibility that it may be at an earlier stage compared with cancers diagnosed after symptoms appear. Earlier detection generally gives doctors more treatment options for you and can sometimes improve outcomes.

I occasionally see situations in clinical practice where a patient like you undergoes imaging for a completely unrelated reason, and a lung lesion is discovered unexpectedly. While the news can understandably feel shocking for you, in some cases, this type of incidental detection allows the disease to be identified earlier than it otherwise would have been.

It is also important for you to understand that the sleep apnea evaluation itself did not cause lung cancer. The scan simply allowed doctors to see something that might have remained unnoticed for some time in your case. Although the discovery may feel accidental for you, it can sometimes provide an opportunity to diagnose and treat the condition earlier.

I hope you are satisfied with my answer. For further queries, you can consult me at iCliniq.

Thank you.