A diagnostic enigma: eruptive syringoma in an adolescent girl

Eruptive syringoma is a rare, benign eccrine ductal tumor that presents as sudden crops of multiple, firm, skin-colored papules and is frequently mistaken for common facial papular eruptions. We report a 17-year-old female with a 3-month history of asymptomatic papules clustered symmetrically around the eyelids and oral commissures, with additional similar lesions over the abdomen; clinical differentials included milia, sebaceous hyperplasia, xanthoma, trichoepithelioma, and acneiform eruption. Dermoscopy showed whitish to yellowish structureless areas with ovoid globules in a reticular pattern on a light brown background, without central umbilication or follicular openings. Histopathology confirmed the diagnosis by demonstrating multiple small eccrine ducts within a fibrous stroma, lined by two layers of cuboidal cells with characteristic comma-shaped “tadpole” extensions and luminal eosinophilic material. The patient was reassured and treated for cosmetic concern with radiofrequency ablation of facial lesions, with residual lesions managed using topical tretinoin, highlighting the importance of recognizing this benign entity and confirming it with biopsy to prevent misdiagnosis and unnecessary treatment.