-Case Reports-

A Case with Unique Dermoscopic Findings: Collision of an Apocrine Gland Cyst and a Trichoblastoma

Keigo Ito^1,2, Shin-ichi Ansai^1,2, Azusa Ogita¹, Hidenori Matsuda¹ and Hidehisa Saeki³

¹Division of Dermatology, Nippon Medical School Musashi Kosugi Hospital, Kanagawa, Japan
²Division of Dermatopathology, Nippon Medical School Musashi Kosugi Hospital, Kanagawa, Japan
³Department of Dermatology, Nippon Medical School, Tokyo, Japan

We report a case of a blue-black nodule on the left upper eyelid of a 77-year-old woman. Dermoscopic examination of the lesion revealed a purple or purple-red homogenous opaque area like that often observed in apocrine gland cysts and a yellow-whitish homogenous structure with arborizing vessels. After resection of the tumor, a final diagnosis of collision of an apocrine gland cyst and a trichoblastoma was made. We should note the possibility that trichoblastoma may exhibit a yellow-whitish homogenous structure in dermoscopy.

J Nippon Med Sch 2018; 85: 334-336

Keywords
dermoscopy, collision, apocrine gland cyst, trichoblastoma

Correspondence to
Keigo Ito, MD, PhD, Division of Dermatology, Nippon Medical School Musashi Kosugi Hospital, 1-396 Kosugi-cho, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
keigo-ito@nms.ac.jp

Received, April 18, 2018
Accepted, June 11, 2018