Persistent diaper erythema with punctate satellite lesions

Specialty: Pediatrics.

• Candidal diaper rash
• candida superinfection in the diaper area

Why it occurs

• Opportunistic fungal skin infection due to Candida albicans yeast (excessive proliferation of the fungus facilitated by optimal conditions of humidity, temperature, epidermal maceration due to prolonged contact with urine and feces, and alteration of perianal skin pH)
• Previous broad-spectrum antibiotic treatment (which destroys the normal commensal bacterial flora of the skin and digestive tract, promoting the overgrowth of yeasts that are eliminated through the fecal route, colonizing the diaper area)
• Untreated or poorly managed long-standing primary irritant diaper dermatitis (loss of skin barrier integrity facilitates secondary fungal invasion)
• Occult primary or secondary immunodeficiency (in infants with refractory, persistent cutaneous candidiasis and associated oral candidiasis/recalcitrant "muget" that is difficult to control).

Initial workup

The differential diagnosis is eminently clinical by visual examination of the lesions (diaper candidiasis characteristically affects the deep skin folds -inguinal and intergluteal flexural areas- showing bright red scaly plaques with raised edges and the presence of punctate papulo-pustular satellite lesions distributed beyond the main erythema, unlike diaper dermatitis. simple irritant contact that respects the folds). In cases of doubt, refractoriness or suspicion of immunodeficiency: Gentle scraping of the satellite papules for direct microscopic examination with 10-20% KOH (visualization of budding hyphae and yeast) or mycological culture. Basic immunological analysis if associated systemic symptoms.

Standard management

• Miconazole or Clotrimazole 1-2% in cream or ointment — topical imidazole antifungals of choice; apply a thin, uniform layer over the entire affected area and inguinal folds at each diaper change, after gentle hygiene and thorough drying of the skin, for a minimum of 7 to 10 consecutive days
• Nystatin cream — effective alternative against Candida spp.; apply 3 or 4 times a day on lesions
• Water-based paste or 20-40% zinc oxide — protective physical barrier; apply in a generous layer after the antifungal cream has dried to avoid direct contact with moisture
• Hydrocortisone 1% cream (low-potency corticosteroid, indicated only for a maximum of 3 consecutive days if an extremely severe inflammatory component coexists that generates severe pain; avoid prolonged use or under strict occlusion due to the risk of systemic absorption and atrophy).