Incontinentia Pigmenti Misdiagnosed as Neonatal Herpes Simplex Virus Infection

Incontinentia pigmenti (IP) is an X-linked dominant neurocutaneous syndrome with ophthalmologic, neurologic, cutaneous, and dental manifestations and in most cases antenatally lethal in boys. Occasionally, typical IP may occur in boys due to Klinefelter syndrome or a genomic mosaicism. Skin lesions are observed in 4 stages: blistering, verrucous linear plaques, swirling macular hyperpigmentation, followed by linear hypopigmentation that develop during adolescence and early adulthood. Neonatal herpes simplex virus (HSV) infection can be manifested in 3 forms: localized, disseminated, and central nervous system (CNS) involvement. Timely diagnosis and treatment of neonatal HSV infection is critical. In this case report, we present a 12-day female newborn with a history of maternal genital HSV in second trimester and vesicular lesions on the upper and lower limbs that was appeared at first hours of life. She was admitted in the maternity hospital that was born and was treated by antibiotic and acyclovir for 11 days. Then, she readmitted for her distributed vesicular lesions. The results of blood and CSF for HSV PCR were negative. Eventually the diagnosis for incontinentia pigmenti was made by consultation with a dermatologist, and skin biopsy confirmed the diagnosis.

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