Neonatal syringocystadenoma papilliferum: A case report.

BACKGROUND: Syringocystadenoma papilliferum (SCAP) represents a rare, noncancerous adnexal tumor predominantly presenting at birth or in early childhood. CASE SUMMARY: In this study, a 35-day-old girl was admitted to Kunming Children's Hospital in October 2019 due to a lesion in the right frontotemporal region since birth. The surface of the lesion was bright red, granular, and papillary and easily bled upon touch, with about 1.5 cm × 4 cm in size. A subcutaneous mass was felt at the base of the lesion, with a size of about 3 cm × 5 cm. Dermatoscopy showed that the skin lesion was lobular and crumby. The lesion center was reddish or white, while the edges were white or yellowish band-like. There were polymorphic vascular structures and white radial streaks in the lesion, with some vascular clusters scattered. Pathological examination showed papilloma-like hyperplasia of the epidermis, with the epidermis partly sinking into the dermis to form several cystic depressions. Combining clinical and histopathological features, the child was diagnosed with SCAP. Follow-up is ongoing, and surgical resection will be performed. CONCLUSION: This was a special clinical manifestation of SCAP, which complements the clinical manifestations of the disease and provides new insights for the diagnosis and differentiation of neonatal skin tumors.