Ann Dermatol.  2009 Nov;21(4):440-442. 10.5021/ad.2009.21.4.440.

Two Cases of Coccygeal Polypoid Eccrine Nevi Presenting as Skin Tags

• Park MY
• Lee ES

• KMID: 2156517
• DOI: http://doi.org/10.5021/ad.2009.21.4.440

Abstract

An eccrine nevus is a rare hamartoma characterized by an increase in the number or size of eccrine glands. Eccrine nevi usually present as localized hyperhidrosis and are not associated with overlying skin abnormalities. However, among the cases that have been reported in the literature, some unique presentations of eccrine nevi have been demonstrated, including a pigmented patch, a depressed nodule, linear papules, and a sacral skin tag. Herein, we report two unusual cases of coccygeal polypoid eccrine nevi and review the literature.

Keyword

Coccyx; Eccrine nevus; Polypoid type

MeSH Terms

Coccyx
Eccrine Glands
Hamartoma
Hyperhidrosis
Nevus
Skin
Skin Abnormalities

Figure

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  Fig. 1 (A) A 0.5 cm pedunculated papule in the coccygeal region of patient 1. (B) A similar lesion on the buttocks of patient 2.

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  Fig. 2 (A) A polypoid mass showed mild acanthosis and hyperkeratosis, and dermal proliferation of eccrine structures. (B) The eccrine units were structurally normal and mild dilated vessels were noted. (C) A papule with acanthosis and hyperkeratosis contains multiple eccrine units in the dermis. (D) Abundant, well-formed eccrine ducts and glands with no concomitant proliferation of vessels or nerves are shown (A~D: H&E stain, A, C: ×40, B, D: ×200).

Reference

1. Oh SW, Kang TW, Kim YC, Lew W. Coccygeal polypoid eccrine naevus. Br J Dermatol. 2007. 157:614–615.

2. Thomas VD, Swanson NA, Lee KK. Wolff K, Goldsmith LA, Katz SI, Gilchrest BA, Paller AS, Leffell DJ, editors. Benign epithelial tumors, hamartomas, and hyperplasias. Fitzpatrick's dermatology in general medicine. 2008. 7th ed. New York: McGraw-Hill;1060.

3. Kawaoka JC, Gray J, Schappell D, Robinson-Bostom L. Eccrine nevus. J Am Acad Dermatol. 2004. 51:301–304.

4. Salama H, Shwayder T. Eccrine nevus presenting as a hypopigmented patch. Pediatr Dermatol. 2008. 25:613–615.

5. Morris ES, Scheel MM, Lundquist KF, Raimer SS. Grouped papules on the arm of an infant. Eccrine nevus. Arch Dermatol. 2000. 136:549–552.

6. Mahdavy M, Smoller BR. Eccrine nevus presenting as a perianal skin tag: a case report and review of the literature. Am J Dermatopathol. 2002. 24:361–363.

7. Beer TW, Lam MH, Heenan PJ. Elder DE, Elenitsas R, Johnson BL, Murphy GF, Xu G, editors. Tumors of fibrous tissue involving the skin. Lever's histopathology of the skin. 2008. 10th ed. Philadelphia: Lippincott Williams & Wilkins;981.

8. Weiss SW, Goldblum JR. Weiss SW, Goldblum JR, editors. Benign lipomatous tumors. Enzinger and Weiss' soft tissue tumors. 2008. 5th ed. Philadelphia: Mosby;459–460.

9. Ahmed TS, Priore JD, Seykora JT. Elder DE, Elenitsas R, Johnson BL, Murphy GF, Xu G, editors. Tumors of the epidermal appendages. Lever's histopathology of the skin. 2008. 10th ed. Philadelphia: Lippincott Williams & Wilkins;883.