Muehrcke’s nails is a type of leukonychia striata characterized by horizontal white lines on a nail that run parallel to the lunula (the crescent shaped whitish area that appears at the bed or proximal area of a fingernail or toenail). Because they are part of the vascular nail bed that exists underneath the nail plate, they do not move or “grow out” when the nail grows. Additionally, the transverse lines tend to disappear when pressure is applied to the nail, at least temporarily.
Muehrcke’s nails are different from Beau’s lines, which are grooved ridges, and Mees' lines, which grow out with the nail as it lengthens.
The nail abnormality was first described by American physician Robert C. Muehrcke in a 1956 issue of British Medical Journal after he noticed transverse, white lines on the nails of patients with chronic hypoalbuminemia (a medical condition in which blood levels of the protein albumin are abnormally low). Albumin is made in the liver, and as sites like MedScape and WebMD point out, it helps distribute hormones and vitamins throughout the human body, as well as helps keep fluid from leaking out of the blood vessels.
In addition to being linked to hypoalbuminemia, Muekrcke lines have also been seen in patients who have:
- Cancer that lead to chemotherapy
- Kidney disease, including nephrotic syndrome
- Liver disease, including cirrhosis
- Malnutrition from unbalanced diets that lead to an extreme lack of nutrients in the body
When Muehrcke lines are associated with a serum albumin deficiency, albumin infusions can help the lines disappear. Otherwise, treatment of the specific health problem that caused the lines will eventually eradicate the condition.
Notice concerning medical entries:
Articles having medical content shall serve exclusively for the purpose of general information. Such articles are not suitable for any (self-) diagnosis and treatment of individual illnesses and medical indications. In particular, they cannot substitute for the examination, advice, or treatment by a licensed physician or pharmacist. No replies to any individual questions shall be effected through the articles.