Proliferating trichilemmal tumor developing in nevus sebaceous.

Auteur(s) : Hitoshi Takeda, Satsuki Ikenaga, Takahide Kaneko, Koji Nakajima, Ken Harada, Katsumi Hanada, Daisuke Sawamura Department of Dermatology, Hirosaki University School of Medicine, 5 Zaifu-Cho, Hirosaki, Aomori 036-8562, Japan Proliferating trichilemmal tumor (PPT) is a rare tumor originating in the external root sheath; it is commonly found in middle-aged or elderly females [1]. We report here an unusual case of a PPT arising from nevus sebaceous (NS) in the scalp of an elderly [...]