Crenated Red Blood Cells: Causes, Symptoms & What They Mean

Crenated blood cells are red blood cells that have taken on a jagged, spiky shape. This shape change occurs when red blood cells are exposed to a hypertonic solution, which is a solution with a higher concentration of solutes than the cells themselves. When the red blood cells come into contact with the hypertonic solution, water moves out of the cells and into the solution. This causes the red blood cells to shrink, which damages their cell membranes and gives them their crenated appearance.

Crenated blood cells can be a sign of several medical conditions, including dehydration, kidney failure, and diabetes. They can also be seen in people who have been taking certain medications, such as diuretics and chemotherapy drugs.

If you see crenated blood cells on a blood test result, it is important to talk to your doctor to find out what is causing the condition and how it can be treated.