Infantile perianal pyramidal protrusion: A retrospective review of 27 patients.

Background: Infantile perianal pyramidal protrusion (IPPP) is a rare benign skin condition that is typically seen in infant girls. This condition is often mistaken for other skin lesions such as acrochordons, condyloma acuminatum, and sequelae of sexual abuse. Many clinicians are unfamiliar with IPPP which can lead to aggressive workup and treatment. The purpose of this study was to elucidate demographic data, clinical features, diagnostic workup, and management of IPPP in a large cohort of patients seen at an academic medical center.
Methods: A retrospective review of patients diagnosed with IPPP at Mayo Clinic, Rochester, MN was conducted. Demographic data, examination findings, diagnostic workup, and treatments were noted.
Results: Twenty-seven patients with IPPP, 24 of which were girls and 3 were boys from the ages of 1 day to 4 years (mean 10.8 months, median 8.6 months) were identified. Symptoms were reported in 63% (17/27) of patients. Four patients received treatment with topical corticosteroid or local anesthetic. No patient underwent skin biopsy.
Conclusion: IPPP is commonly observed in healthy prepubertal girls. Constipation is a common symptom. Awareness of this entity may prevent overtreatment and unnecessary evaluation.
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