In many physical examination reports
There are three words for "pulmonary nodule"
More than 95% of them are benign
It is only recommended to review annually
But there are also some special cases
For example, there are some 8 mm nodules
More dangerous than a 12mm nodule
Why is this?
How to determine the risk of pulmonary nodules?
What is the key point to read when you get the report?
01
Physical examination reveals that 95% of pulmonary nodules are benign
The three words "pulmonary nodule" on the physical examination report scare away countless people.
Let me give you some reassurance first: more than 95% of pulmonary nodules are benign, and less than 5% are actually malignant tumors. In layman's terms, it means that there are less than 5 people out of 100, and the vast majority of people are just false alarms.
The so-called pulmonary nodule is just a description on CT images, which refers to a round or irregular shadow with a diameter of ≤3 cm in the lung. It does not mean lung cancer. It may be inflammation, old scars, tuberculosis, but also a small number may be tumors.
02
Smaller nodules may not necessarily be safer
Many people think that the larger the nodule, the more dangerous it is. The doctor used three cases to directly break this inherent knowledge.
The doctor compared three cases: 8 mm mixed ground glass nodule, 10 mm pure ground glass nodule, and 12 mm solid nodule.
The doctor gave a popular explanation with the help of glass props:
A pure ground glass nodule is a shadow within the lung, but the structures behind it can still be vaguely seen through it.
Mixed ground glass nodules are solid components appearing in the shadow of ground glass.
In solid nodules, the entire lesion is dense and the original lung tissue texture cannot be seen.
Analysis conclusion: The malignant risk of 8-mm mixed ground-glass nodules may be higher than that of 12-mm solid nodules.
⚠️Important reminder: In this case of a 12 mm solid nodule, the premise is that the shape is regular, the edges are smooth, and the imaging judgment is likely to be benign, so the risk is low. Not all 12 mm solid nodules are safe. If the solid nodule appears spiculated and divided, the risk of malignancy is also high.
Mixed ground-glass nodules contain both ground-glass shadow and solid components, and the risk of malignant invasion is higher. On the other hand, the imaging characteristics of this 12 mm solid nodule tend to be benign, so although it is large, the risk is lower.
This also reminds us: To judge whether a pulmonary nodule is benign or malignant, we cannot just focus on the size. Density, morphology, and follow-up changes are also crucial.
03
Three dimensions to teach you how to understand
Pulmonary nodules in physical examination report
When ordinary people get a pulmonary nodule report, they don’t need to panic at the information on the Internet. They can grasp the three core dimensions to initially understand the report:
1. Look at the density type
Mixed ground-glass nodules: have the highest risk of malignancy and require special attention.
Pure ground glass nodules: Most progress slowly, many are precancerous lesions, and most can be followed up regularly.
Solid nodules: The risk span is large. Judging benign and malignant needs to be based on the shape. The shape is smooth and regular, and most of them tend to be benign. If the solid nodule is malignant, the risk to life is greater.
2. Look at the morphological characteristics
Reports show smooth edges, clear boundaries, and calcification, and most of them tend to be benign.
If spiculation signs, lobulation signs, pleural traction, blood vessel crossing, or vacuole signs appear, you should be more vigilant, as the probability of malignancy will increase significantly.
3. Look at dynamic follow-up changes
Nodules cannot be diagnosed after just one CT scan. Changes during follow-up are very critical.
Most benign nodules remain stable for a long time. Inflammatory nodules may shrink or even disappear on their own. If the nodule is found to be enlarged during follow-up, or if the solid components in the ground-glass nodule continue to increase, and the density continues to increase, you should attach great importance to it and see a specialist for evaluation as soon as possible.
04
non-smokers
Malignant lung lesions may also occur
Many people think that lung cancer only affects people who smoke for a long time. However, it has been found clinically that some patients with ground glass nodule-related lung cancer do not have a history of smoking, and this situation is more common especially in female patients.
⚠️Note: This does not mean that young women who do not smoke are at high risk for lung cancer. This is just a new phenomenon observed clinically.
The traditional high-risk groups that experts refer to are older heavy smokers, and the incidence of lung cancer in this group has not changed significantly. A considerable part of this type of ground-glass nodule lung cancer occurs in non-high-risk groups according to the traditional definition, and the exact cause has not yet been found.
For traditional non-high-risk groups, experts put forward the idea of "young age, low frequency" screening: For people who have no high-risk factors, no relevant family history, and no abnormality in the lungs on CT examination, it is not recommended to blindly and frequently undergo CT screening. After evaluation by a specialist, reexamination should be done every 5 to 10 years. Once a pulmonary nodule is detected on CT, it must be evaluated by a specialist and do not interpret the report on your own.
For traditional high-risk groups, that is, older heavy smokers, it is recommended to undergo low-dose spiral CT screening once a year. This screening has a lower radiation dose and can effectively detect lung lesions.
05
These physical abnormalities occur
Seek medical attention promptly for investigation
Lung tissue itself has no pain-sensing nerves. With early-stage lung cancer, most people don’t feel any discomfort. As long as the tumor has not invaded the pleura or large bronchi, even if it grows to 1 to 2 centimeters, it is difficult for the body to detect abnormalities. Relying on physical sensations to screen for early-stage lung cancer is unreliable. Once obvious symptoms appear, many have progressed to the middle and late stages.
If your body shows any of the following symptoms, don’t take the seat yourself. Relevant symptoms do not mean that you have lung cancer. You must seek medical examination in time and leave it to a professional doctor for judgment:
Respiratory signals:
1. Irritating dry cough: Unexplained irritating dry cough with no sputum or only a small amount of white foamy sputum. Taking cough medicine can provide temporary relief, but the cough will recur and persist. This situation should be taken seriously.
2. Blood in the sputum and hemoptysis: The presence of blood streaks in the sputum is a sign that deserves high vigilance.
3. Chest tightness and shortness of breath: breathlessness after activities or even while sitting quietly.
4. Chest pain: persistent chest pain in a fixed position, and the pain worsens when coughing and taking deep breaths.
Non-respiratory signals that are easily overlooked:
1. Persistent shoulder and back pain: The tumor at the apex of the lung invades the nerves, and the pain can be reflected to the shoulder periphery, which can easily be mistaken for frozen shoulder. If you have unexplained shoulder and back pain that persists and does not relieve, it is recommended to first identify the cause and then choose an appropriate treatment. Do not judge the cause by yourself.
2. Hoarseness: Tumor or metastatic lymph nodes compress the recurrent laryngeal nerve.
3. Clubbing: The ends of the fingers and toes are enlarged and thickened, resembling a drumstick in appearance.
4. Unexplained sudden weight loss: There is no deliberate weight loss, and the weight drops significantly in a short period of time.
06
Carry out screening and daily protection
Protect lung health
Judging lung health cannot rely on the presence or absence of physical discomfort.
1. Screening and selection methods
Low-dose spiral CT is an effective means to detect pulmonary nodules and carry out early lung cancer screening. It is difficult to detect tiny pulmonary nodules with ordinary chest X-ray. However, CT examinations involve radiation, and unnecessary examinations should be avoided.
2. Quit smoking and stay away from second-hand and third-hand smoke
Smoking is the clear primary risk factor for lung cancer. The sooner you quit smoking, the greater your physical benefits will be.
3. Regulate emotions
Reduce long-term anxiety, sulking, and negative emotions that can affect your autoimmune state.
Warm reminder: The content of this article is compiled from the popular science opinions of experts and cannot replace the diagnosis and treatment of professional doctors. Individual situations are different. Please consult a respiratory department or thoracic surgeon based on your own imaging report and do not make any judgments on your own.
Action Guide for Protecting Lung Health
1. Don’t panic if pulmonary nodules are detected during physical examination, more than 95% of them are benign.
2. The bigger the nodule is, the more dangerous it is. An 8 mm mixed ground glass may be more dangerous than a 12 mm solid nodule.
3. When you get the report, focus on three dimensions: density type, morphological characteristics, and dynamic follow-up changes.
4. No smoking ≠ zero risk. Some ground-glass nodule lung cancer occurs in non-high-risk groups, and screening should be done at a "low age and low frequency".
5. Most early-stage lung cancer has no symptoms. If you experience irritating dry cough, shoulder and back pain, hoarseness, clubbing of your fingers, or unexplained sudden weight loss, you should be alert.
6. High-risk groups should undergo low-dose spiral CT once a year, and the report recommends submitting it to a specialist for evaluation. (CCTV Life Circle)
