Dr. David Midthun of Pulmonary and Critical Care Medicine at the Mayo Clinic states that noncancerous lung nodules commonly occur due to a prior fungal infection, a bacterial infection, a mycobacterial infection or a benign tumor. A solitary lung nodule sometimes indicates an early cancer.Know More
Dr. Midthun explains that lung nodules are common and usually noncancerous. They are typically scars that result from a prior infection, such as histoplasmosis or coccidiodomycosis. A CT scan of the chest reveals one or more tiny nodules in many cases. These nodules look white because they are denser than the surrounding lung, which contains air and appears darker. Smaller nodules are mostly noncancerous, particularly those that are less than 5 millimeters in size. However, larger nodules that measure more than 20 millimeters have more than a 50 percent chance of being cancerous.
When a solitary lung nodule is detected, doctors typically consider other factors that affect the probability of the nodule being cancerous, notes Dr. Midthun. Smokers have a higher risk of lung cancer. People older than 50 are also more likely to have a malignant nodule. Moreover, a family history of lung cancer and asbestos exposure both present an increased risk factor. The nodule is most likely noncancerous if there is no change in size, shape or appearance after comparing the patient's current X-ray or CT scan with a previous one.Learn more about Organs
Dark spots on lungs are caused by a number of different things, including parasitic infections, bacterial infections and fungal infections, according to Dr. Lynne Eldridge writing for About Health. A dark spot on a lung CT does not always mean it's a cancerous growth. Dark spots can be cysts, pulmonary fibroids or blood vessel abnormalities.Full Answer >
New Health Guide explains that white spots on toenails can be caused by injury, allergic reaction, zinc deficiency, calcium deficiency, fungal infection or illness. In most cases, white spots, also called leukonychia, are not a cause for concern. However, if the spots appear frequently or in patterns, MDhealth.com warns that medical attention is necessary to track down the exact cause.Full Answer >
Pleural fluid prevents friction between the lungs and the chest cavity during respiration, and is found in a thin space between two layers of tissue. The tissues surrounding the lungs produce the fluid that rhythmically ebbs and flows in the small pleural space.Full Answer >
Vitiligo is one condition that can cause white spots on the back and neck, according to WebMD. The condition occurs when the body destroys the cells that are responsible for color pigment in the skin.Full Answer >