1. Jung SH, Kim CW, Kim HS, Lee WS. Squamous cell carcinoma of the external auditory canal: Treatment results of 15 cases. Korean J Otolaryngol-Head Neck Surg. 2005; 48(2):136–41.
2. Kim CH, Choi HS, Lee SJ, Mo JY. A case of salvage operation in radiation-failed squamous cell carcinoma transformed from Bowen’s disease. Korean J Otolaryngol-Head Neck Surg. 2004; 47(5):478–82.
3. Sismanis A, Hughes G. Carcinoma in situ of the ear canal. Am J Otol. 1980; 2(2):158–9.
4. Shu MT, Lin HC, Yang CC, Chang KM. Squamous cell carcinoma in situ of the external auditor y canal. J Laryngol Otol. 2006; 120(8):684–6.
5. Bennett RJ, Davis BT. A case of intra-epidermal carcinoma (Bowen’s disease) of external auditory meatus treated by deep X-rays. J Laryngol Otol. 1953; 67(12):764–7.
6. Oztürkcan S, Oztürkcan S. Dermatologic diseases of the external ear. Clin Dermatol. 2014; 32(1):141–52.
7. Murao K, Yoshioka R, Kubo Y. Human papillomavirus infection in Bowen disease: Negative p53 expression, not p16(INK4a) overexpression, is correlated with human papillomavirus-associated Bowen disease. J Dermatol. 2014; 41(10):878–84.
8. Eftekhari H, Gharaei Nejad K, Azimi SZ, Rafiei R, Mesbah A. Bowen’s Disease associated with two human papilloma virus types. Acta Med Iran. 2017; 55(9):594–6.
9. de Villiers EM, Fauquet C, Broker TR, Bernard HU, zur Hausen H. Classification of papillomaviruses. Virology. 2004; 324(1):17–27.

10. Muñoz N, Bosch FX, de Sanjosé S, Herrero R, Castellsagué X, Shah KV, et al. Epidemiologic classif ication of hu man papillomavirus types associated with cervical cancer. N Engl J Med. 2003; 348(6):518–27.
11. Winer RL, Lee SK, Hughes JP, Adam DE, Kiviat NB, Koutsky LA. Genital human papillomavirus infection: Incidence and risk factors in a cohort of female university students. Am J Epidemiol. 2003; 157(3):218–26.
