HS Kim, et al Fig. 1. Numerous, 1∼2 mm-sized yellowish papules scattered on the scrotum and proximal half of the penile shaft. Note the perifollicular distribution of the lesions. Fig. 2. Histology shows a lobulated lesion composed of enlarged sebaceous glands (＞4 around each pilosebaceous unit) extending down into the dermis. The cells are predominantly mature sebocytes with a peripheral germinative layer. No cytological atypia were present (H&E, ×100). nitidus, molluscum contagiosum, genital warts, ectopic sebaceous glands, and pearly penile papules. Dermosco- py and a histological examination can aid in the diagnosis of penile SH. Dermoscopy is a simple and non-invasive tool, which is widely used in the dermatologic field. SH is viewed as aggregated white or yellow nodules with small craters and “crown vessels” (non-arborizing vessels) under dermoscopy8. S342 Ann Dermatol SH has been described in textbooks as a common normal variant on the scrotal skin and penile shaft9, but it has rarely been reported in Asia. We do not know the true incidence of scrotal SH in Asians, but it is very likely that many Koreans are reluctant to discuss skin lesions on their genitalia, which makes its overall incidence appear low. Accordingly, only one report has been published on SH of the scrotum and penile shaft in Korea. In Choi’s study10, the authors reported their case as unusual, which may not be true. We feel that our case would be an additional good normal variant reference, particularly for Asian dermatologists. SH should be considered a possibility when facing a patient with multiple tiny papules on the penis. It is important to reassure the patient that SH is not contagious. Treatment is not necessary other than for cosmetic purposes. REFERENCES 1. Vergara G, Belinchón I, Silvestre JF, Albares MP, Pascual JC. Linear sebaceous gland hyperplasia of the penis: a case report. J Am Acad Dermatol 2003;48:149-150. 2. Kumar A, Kossard S. Band-like sebaceous hyperplasia over the penis. Australas J Dermatol 1999;40:47-48. 3. Ju HY, Kim HS, Kim HO, Park YM. Sebaceous hyperplasia of the penile shaft. J Eur Acad Dermatol Venereol 2009;23: 443-444. 4. Ma HJ, Zhao G, Wang YX. Sebaceous hyperplasia of the scrotum in an adolescent boy. Pediatr Dermatol 2007;24: 340-342. 5. Eisen DB, Michael DJ. Sebaceous lesions and their associ- ated syndromes: part I. J Am Acad Dermatol 2009;61:549- 560. 6. Pochi PE, Strauss JS, Downing DT. Age-related changes in sebaceous gland activity. J Invest Dermatol 1979;73:108- 111. 7. Ortiz-Rey JA, Martín-Jiménez A, Alvarez C, De La Fuente A. Sebaceous gland hyperplasia of the vulva. Obstet Gynecol 2002;99:919-921. 8. Ena P, Origa D, Massarelli G. Sebaceous gland hyperplasia of the foreskin. Clin Exp Dermatol 2009;34:372-374. 9. Bunker CB, Neill SM. The genital, perianal and umbilical regions. In: Burns T, Breathnach S, Cox N, Griffiths C, edi- tors. Rook's textbook of dermatology. 7th ed. Oxford: Black- well Science, 2004. 10. Choi KH, Oh ST, Lee JY, Cho BK, Park HJ. Sebaceous hyperplasia of the penile shaft in a young male. Korean J Dermatol 2009;47:189-191.