Microscopic examination of the lesion showed a silhouette consistentwith a skin tag. The lesion was composed of loose stroma with an increasednumber of well-formed miniaturized eccrine ducts and coils in the dermis.No cytologic atypia or mitotic activity was observed. The distribution andappearance of blood vessels were normal, and no angiomatous proliferationwas detected.
Eccrine nevus, which is a very rare benign appendageal tumor, has beenmost frequently reported in the literature as clinically presenting as a circumscribedarea of hyperhydrosis.1 It may also presentas a depressed brownish patch, a centrally depressed nodule with scaly border,a solitary sweat-discharging pore, or asymptomatic papules without hyperhidrosis,sometimes in linear distribution. The most frequent location of EN is theforearm, but other sites, such as the legs, forehead, back, perianal area,hands, scalp, and trunk, may also be involved.1 Thepresent case had the clinical appearance of a congenital skin tag.
A Congenital Perianal Polypoid Lesion—Diagnosis. Arch Dermatol. 2005;141(4):515-520. doi:10.1001/archderm.141.4.515-f