Diagnosing Vitiligo: A Comprehensive Clinical and Laboratory Evaluation

In this episode titled "Diagnosing Vitiligo: A Comprehensive Clinical and Laboratory Evaluation," moderator Nada Elbuluk, MD, MSc, FAAD and panelist Susan Taylor, MD, FAAD discuss the essential steps clinicians should take when evaluating a patient with vitiligo.

Dr. Taylor outlines a structured approach beginning with a thorough history, including age of onset, lesion location and progression, potential triggers such as stress or skin trauma, symptoms like pruritus or burning, and any concomitant autoimmune conditions including thyroid disease, diabetes, lupus, or arthritis. She also inquires about occupational chemical exposures that may cause depigmentation, hearing loss, family history of vitiligo or autoimmune disease, and — critically — the psychosocial impact of vitiligo on a scale of 0 to 10, including effects on work, school, and social activities.

For the physical examination, Dr. Taylor stresses the importance of having patients fully undress to assess total body surface area involvement, which directly informs treatment decisions. A complete skin exam — including genital and intergluteal areas — is essential for determining whether disease is localized or widespread. She also uses a Wood's lamp to detect subtle macules that may otherwise be missed, particularly in fair-skinned patients.

Laboratory investigations recommended include a complete metabolic panel, complete blood count, ANA, hemoglobin A1c, rheumatoid factor, and thyroid function tests including antibodies such as antithyroglobulin and TPO.

Dr. Elbuluk reinforces the value of dermoscopy as an additional tool for identifying signs of disease activity and other vitiligo markers. Both physicians emphasize that asking about psychosocial well-being is not only clinically important but helps build a therapeutic alliance and long-term trust with patients managing this chronic condition.

In the next episode, "Vitiligo Pathogenesis: How the JAK-STAT Pathway Drives Melanocyte Destruction," the conversation shifts to the immunological mechanisms underlying vitiligo and how understanding those mechanisms has transformed the therapeutic approach.