Muehrcke lines in nails are seen in:: (A) Nephrotic syndrome, (B) Bater syndrome, (C) Nail-patella syndrome, (D) Acute tubular necrosis
Answer is A. Muehrcke's lines are white lines (leukonychia) that extend all the way across the nail and lie parallel to the lunula. Muehrcke's lines - associated with decreased protein synthesis, which occur during metabolic stress & in hypoalbuminemic states such as the nephrotic syndrome. It should not be confused with Half-and-half nail syndrome/Lindsay's nails- most characteristic onychopathy seen in chronic renal failure.