USMLE Prep - Medical Reference Library

Vitiligo — Diagnosis & Repigmentation Therapies

System: Dermatology • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

Autoimmune depigmentation with loss of melanocytes. Combine topical therapies with NB‑UVB; consider systemic JAK inhibitors in select; address psychosocial impact and sun protection.

Key Points

  • Stabilize ABCs; begin targeted evaluation without delaying life-saving therapy.
  • Use system-specific risk tools to guide testing and disposition.
  • Order high-yield tests first; escalate imaging when indicated.
  • Start evidence-based initial therapy and reassess frequently.

Algorithm

  1. Primary survey and vitals; IV access and monitors.
  2. Focused history/physical; identify red flags and likely etiologies.
  3. Order system-appropriate labs and imaging (see Investigations).
  4. Initiate guideline-based empiric therapy (see Pharmacology).
  5. Reassess response; arrange consultation and definitive management.

Clinical Synopsis & Reasoning

For Vitiligo Diagnosis Repigmentation Therapies, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as CBC (Baseline hematology), BMP (Electrolytes/renal). Incorporate bedside imaging and targeted labs to define severity and identify complications; synthesize results with clinical trajectory to refine the working diagnosis and disposition needs.


Treatment Strategy & Disposition

Initiate disease‑directed therapy alongside supportive care, titrating to objective response. Pharmacologic options commonly include Analgesia/Antipyretics. Use validated frameworks (e.g., Therapy Overview) to guide escalation and site of care. Address precipitating factors, de‑escalate empiric therapies with data, and arrange follow‑up for monitoring and risk‑factor modification; admit patients with instability, high risk of deterioration, or needs for close monitoring.


Management Notes

Repigmentation starts perifollicularly; set expectations for months of therapy. Monitor for treatment‑related skin atrophy or irritation.


Epidemiology / Risk Factors

  • Risk factors vary by condition and patient profile

Investigations

TestRole / RationaleTypical FindingsNotes
CBCBaseline hematologyAbnormal counts
BMPElectrolytes/renalDerangements

Therapy Overview

ExtentApproach
LocalizedTopical steroids/calcineurin inhibitors
GeneralizedNB‑UVB phototherapy
Refractory focalExcimer laser
SelectedJAK inhibitors
CosmeticCamouflage, micropigmentation

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
Topical corticosteroid (class II–III)Anti-inflammatoryWeeksLimited diseaseSkin atrophy
Topical tacrolimus/pimecrolimusCalcineurin inhibitionWeeksFace/flexuresLocal irritation

Prognosis / Complications

  • Prognosis depends on severity, comorbidities, and timeliness of care

Patient Education / Counseling

  • Explain red flags and when to seek emergent care.
  • Reinforce medication adherence and follow-up plan.

References

  1. AAD/International Vitiligo Task Force — Link