Doctors say a simple test that involves tracing a small diamond-shaped window with your finger could help spot early signs of serious health problems, including lung cancer and heart disease.
Imagine being able to perform a quick test yourself that could be the first sign of a serious health problem.
The Schamroth test, a simple, noninvasive test performed on the fingers, has been recognized by health care professionals as a potential indicator of digital herniation, a condition associated with lung cancer, heart disease, and other serious conditions.
Let’s find out how the Schamroth test works and what its results can mean for your health.
Herniated toes
The Schamroth window test is a simple technique used to check for a herniated finger. As Medscape explains, the condition affects the shape of the fingers and nails.
A digital herniation usually develops over years and progresses in stages. According to Cancer Research UK, for a herniated finger:
The nail bed is warm, and the skin around the nail is shiny.
The fingertips appear wider, giving them a chopstick-like appearance.
The nail bed becomes soft.
The nails become more curved: they bend downward and resemble spoons.
The nail bed feels spongy.
The exact cause of a herniated finger is not fully understood, but Very Well Health states that it is believed to “occur due to long-term low blood oxygen levels, known as hypoxemia.”
Potential Conditions
Digital herniation is associated with several serious conditions, including:
Lung cancer: Studies show that 35% of people with non-small cell lung cancer develop digital herniation, while it is less common in small cell lung cancer (about 4%).
Mesothelioma: This rare cancer, often caused by asbestos exposure, affects the lining of the lungs and chest cavity. Many mesothelioma patients have noticed swelling of the nails.
Chronic lung disease: Diseases such as cystic fibrosis, pulmonary fibrosis, bronchiectasis, and asbestosis can lead to the development of a digital hernia due to long-term oxygen deprivation.
Heart disease: Some congenital heart diseases and infective endocarditis (infection of the heart wall) can cause disruption of oxygen flow, resulting in hernia formation.
Liver and gastrointestinal diseases: Conditions such as liver cirrhosis, Crohn’s disease, and inflammatory bowel disease (IBD) have been associated with clubfoot.
Do-it-yourself test
: To perform the test, follow these steps:
Place your hands in front of your eyes.
Place your index fingers together so that your nails touch.
Pay attention to the spaces between your nails.
Typically, there should be a small, diamond-shaped space between your nails. The lack of this space could be a symptom of a digital hernia, which requires further medical evaluation.
“If you don’t see any gaps under your nails, it means your toes are sausage-shaped. You should see your primary care physician as soon as possible to determine if the sausage-shaped toes are caused by an underlying condition,” oncology nurse Emma Norton told the Huffington Post.
Published by CMAJ on Thursday, November 14, 2019
Please remember that the results are not a definitive diagnosis, but rather a warning sign that you should consult a doctor.