Muehrcke lines associated to active rheumatoid arthritis

Area of Science:

• Dermatology
• Rheumatology
• Internal Medicine

Background:

• Nail examination is crucial for diagnosing systemic diseases.
• Transverse nail discolorations, including Muehrcke lines, have diverse etiologies.
• Rheumatic diseases are a less common cause of Muehrcke lines.

Observation:

• Muehrcke lines are transverse nail bands of leukonychia striata.
• These lines are unspecific, with approximately 70 known causes.
• Cancer treatment is a common cause, while rheumatic diseases are less frequent.

Findings:

• This case report details an unusual presentation of Muehrcke lines.
• The observed Muehrcke lines were associated with active rheumatoid arthritis.
• This association is uncommon in clinical practice.

Implications:

• Recognizing Muehrcke lines can prompt investigation into underlying conditions.
• This case expands the differential diagnosis for Muehrcke lines.
• Early detection of rheumatoid arthritis through nail findings may improve patient outcomes.