[Severe hypernatraemic dehydration in collodion baby].

Area of Science:

• Neonatology
• Pediatric Endocrinology
• Dermatology

Background:

• Collodion ichthyosis is a rare genetic skin disorder characterized by a collodion membrane covering the newborn's body.
• Collodion babies are at high risk for complications including dehydration, infection, and thermal dysregulation due to excessive transepidermal water loss.
• Hydrops fetalis, a severe condition of fluid accumulation in fetuses, can be caused by various factors, including cardiac arrhythmias like supraventricular tachycardia.

Observation:

• A case report details a neonate diagnosed with non-recognized collodion baby syndrome and hydrops fetalis secondary to supraventricular tachycardia.
• The infant experienced severe hypernatraemic dehydration, with serum sodium levels reaching 182 mmol/l within 36 hours of birth, attributed to excessive transcutaneous fluid loss.
• The neonate was managed with cautious rehydration over three days, showing no signs of neurological impairment post-treatment.

Findings:

• Severe hypernatraemia (s-Na+ 182 mmol/l) in a collodion baby is a critical finding linked to transcutaneous fluid loss.
• Early recognition and management of collodion baby syndrome are crucial to prevent life-threatening dehydration.
• Supraventricular tachycardia-induced hydrops fetalis can exacerbate fluid balance issues in neonates.

Implications:

• This case underscores the importance of immediate observation in a humidified incubator for all collodion babies to minimize fluid loss.
• Monitoring serum sodium levels in newborns experiencing significant weight changes is essential for early detection of hypernatraemia.
• Aggressive but cautious rehydration can effectively manage severe hypernatraemia in neonates without neurological sequelae, even in complex cases.