Initial clinical diagnosis of a pilar cyst revised to sebaceous carcinoma of the occipital scalp in a 36-year-old male: a case report - Li, Yunfeng; Pu, Xiaoxia; Hou, Jingmei; Yang, Jingyu; Yang, Rui; Song, Hongbin (AME Case Reports; Vol 10 (May 30, 2026): AME Case Reports, 2026)