Melasma (Investigational Adjunct)

Patienten-Zusammenfassung

Ist dies FDA-zugelassen fuer diese Anwendung?

Not FDA-cleared for melasma. FDA cleared medicinal leeches only for venous congestion in microsurgical reconstruction (K040187, June 2004). Use for melasma is investigational.

Welche Evidenz existiert?

Tier C (investigational). No randomized controlled trials; only anecdotal reports. Evidence-based therapy for melasma: triple combination cream (hydroquinone 4% + tretinoin 0.05% + fluocinolone 0.01%, Kligman formula), strict daily broad-spectrum SPF 50 mineral sunscreen, chemical peels (glycolic, salicylic), and tranexamic acid (oral or topical). Q-switched lasers in selected cases. PIH risk from leech application may worsen melasma in darker skin types.

Hauptrisiken

• Bleeding from bite sites for 6 to 24 hours after detachment
• Worsening of melasma through post-inflammatory hyperpigmentation
• Permanent dark marks or scars at bite sites, especially on the face
• Local skin infection or, rarely, Aeromonas infection from leech gut bacteria
• Allergic reaction to leech saliva (uncommon)
• Trigger of rebound hyperpigmentation after initial improvement
• Delay of evidence-based topical therapy and sun protection
• Cosmetic disfigurement that may be permanent

Wer dies nicht in Betracht ziehen sollte

• Patients with darker Fitzpatrick skin types (IV-VI) at very high PIH risk
• Patients with active inflammatory skin disease at the planned bite site
• Pregnant patients (melasma is hormonal — leech bites add risk without addressing cause)
• Patients on anticoagulants or with severe anemia
• Patients who have not tried triple combination cream and strict sun protection
• Patients with photosensitivity or active sun-induced skin damage

Was Sie Ihren Kliniker fragen sollten

• Have I tried Kligman's triple combination cream consistently for 12 weeks?
• Am I using a broad-spectrum mineral SPF 50 sunscreen daily?
• Have we addressed hormonal triggers (oral contraceptives, pregnancy, thyroid)?
• Am I a candidate for oral or topical tranexamic acid?
• What is the realistic risk of worsening pigmentation given my skin type?
• Are leeches from an FDA-registered supplier and used only once?
• What is the cost and is it covered by insurance? (typically not covered)

Wann dringende medizinische Versorgung suchen

• Rapidly worsening or spreading pigmentation after treatment
• Spreading redness, warmth, pus, or red streaks (cellulitis)
• Fever above 38.0 C / 100.4 F or chills
• Bleeding from a bite site lasting more than 24 hours
• Hives, facial or tongue swelling, throat tightness, or breathing difficulty
• New scarring or permanent dark marks at bite sites