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Perineal skin tag (infantile perianal pyramidal protrusion)

Perineal skin tags may be congenital or acquired. They are generally asymptomatic, but may require surgical intervention if inflamed or traumatized. A similar appearance may occur as a manifestation of lichen sclerosus.

Cutaneous pseudosarcomatous polyp and umbilical polyp

Cutaneous pseudosarcomatous polyps and umbilical pseudosarcomatous polyps are benign proliferations with a tag-like configuration, but dramatic cytologic atypia and pleomorphism. The cells stain positive for vimentin and variably for CD34 and factor XIIIa. Their clinical behavior is benign.

References

Bord A, et al: Prenatal sonographic diagnosis of congenital perineal skin tag: case report and review of the literature. Prenat Diagn  2006 Nov; 26(11):1065-1067.

Cathro HP, et al: Cutaneous pseudosarcomatous polyp: a recently described lesion. Ann Diagn Pathol  2008 Dec; 12(6):440-444.