Management of Hypopigmentation

Hypopigmentation Overview - Pale Patch Patrol

• Definition: ↓ melanin → pale skin patches.
• Common Causes (India):
  • Vitiligo: Chalky-white, well-defined; acrofacial. Wood's: accentuates.
  • Pityriasis Alba: Ill-defined, fine scales; face (children).
  • PIH: History of prior inflammation/injury.
  • Tinea Versicolor: Scaly, variable color; trunk. Wood's: yellow-green fluorescence.
  • Leprosy: Anesthetic, thickened nerves. Biopsy if suspected.
  • Albinism: Generalized, congenital.
• Wood's Lamp: Key for Vitiligo, T. Versicolor diagnosis.
• Biopsy: For diagnostic uncertainty (e.g., Leprosy).

⭐ Koebner phenomenon (new lesions at trauma sites) signifies active vitiligo.

Vitiligo Medical Tx - Repigmenting Rally

Goals: Arrest spread, induce repigmentation.

• Topical Therapies:
  • Potent Corticosteroids: Clobetasol propionate 0.05%. Mainstay for limited areas. ⚠️ SE: Skin atrophy.
  • Calcineurin Inhibitors (TCIs): Tacrolimus 0.1% / Pimecrolimus 1%. Preferred for face, intertriginous areas.
  • Vitamin D3 Analogues: Calcipotriol. Often used in combination.
• Systemic Therapies:
  • Oral Corticosteroids: Oral Mini-Pulse (OMP) to arrest rapidly spreading disease.
• Phototherapy:
  • NB-UVB (311-313 nm): First-line for generalized vitiligo. Favorable safety profile.
  • PUVA (Psoralen + UVA): Oral/Topical. Effective, but more side effects than NB-UVB.

⭐ NB-UVB is generally preferred over PUVA for treating vitiligo due to its better safety profile and no need for psoralen intake.

Vitiligo: Surgery & Depigmentation - Advanced Resurfacing

• Surgical Therapy:
  • Indications: Stable (≥1 year), segmental, focal, Rx-resistant.
  • Techniques:
    • Autologous Grafts: MPG, STSG, SBEG (varied donor sites/methods).
    • NCES: Cellular suspension for larger areas.
    • CMT: Lab-grown melanocytes for extensive areas.
• Depigmentation Therapy:
  • Indications: Extensive (>50% BSA), recalcitrant cosmetically disfiguring.
  • Agent: Monobenzyl ether of hydroquinone (MBEH) 20%.
  • Mechanism: Melanocytotoxic. SE: Irreversible, contact dermatitis, distant depigmentation.

⭐ Stability of vitiligo, typically defined as at least 1 year without new lesions or progression, is a crucial prerequisite for successful surgical intervention.

Other Hypopigmentations - Pale Palette Solutions

• Pityriasis Alba: Ill-defined, hypopigmented, scaly patches on face (children/adolescents). Mgmt: Emollients, hydrocortisone 1%, sunscreen.
• Post-Inflammatory Hypopigmentation (PIH): Post-eczema, burns. Mgmt: Treat cause, TCIs, mild steroids, chemical peels, phototherapy, camouflage.
• Tinea Versicolor (hypopigmented): Malassezia spp. Dx: KOH ('spaghetti & meatballs'). Mgmt: Topical (ketoconazole, selenium sulfide); Systemic (fluconazole, itraconazole) if extensive.
• Leprosy: Hypopigmented patch + definite sensory loss, thickened nerve, AFB on smear/biopsy. Mgmt: WHO MDT.

  ⭐ Definite sensory loss within a hypopigmented patch is a cardinal sign of leprosy.

• Idiopathic Guttate Hypomelanosis (IGH): Small, discrete, 'porcelain-white' macules (sun-exposed). Mgmt: Reassurance, sun protection; cryotherapy, topical retinoids/TCIs (variable success).

General Care & Support - Beyond the Pigment

• Sun Protection: Essential.
  • Broad-spectrum sunscreen (SPF ≥30, PA+++).
  • Protective clothing.
  • Prevents sunburn, reduces contrast.
• Cosmetic Camouflage:
  • Opaque foundations, concealers.
  • Application techniques. Psychological benefit.
• Nutritional Aspects:
  • General nutritional support.
  • Vitamins (B12, Folic acid), antioxidants: adjunctive, weak evidence.
• Psychological Support:
  • Address psychosocial impact (stigma, anxiety).
  • Counselling, support groups.

⭐ Consistent broad-spectrum sunscreen use is key: protects affected skin, reduces surrounding tan, minimizes visibility.

High‑Yield Points - ⚡ Biggest Takeaways

• Vitiligo: Topical steroids/calcineurin inhibitors (localized); NB-UVB phototherapy (generalized); surgical grafting (stable patches).
• Post-Inflammatory Hypopigmentation: Often self-limiting; strict sun protection paramount; topical steroids/PUVA for persistence.
• Idiopathic Guttate Hypomelanosis: Sun protection prevents new lesions; cryotherapy/topical retinoids offer variable results.
• Tinea Versicolor: Treat with topical antifungals (ketoconazole); oral antifungals for extensive/recurrent disease.
• Leprosy: MDT is mainstay; persistent hypopigmented patches may require cosmetic camouflage.
• Chemical Leukoderma: Causative agent avoidance critical; manage similar to vitiligo_._