Distinctive nail pattern following androgen replacement therapy.

Introduction: A distinctive nail pattern in a patient undergoing androgen replacement therapy is presented hereby.

Case Presentation: A 47-year-old male patient noticed a peculiar "washboard-like" pattern on his fingernails. He had been undergoing androgen replacement therapy for late onset hypogonadism syndrome. The patient realized his nails were growing faster after his therapy was altered from a tri-weekly basis to a bi-weekly basis.

Conclusion: This phenomenon is likely to be attributed to the androgen replacement therapy, as the spacing between the ridges were widening in concordance with the strengthening of the therapy.