-Case Reports-

Two Cases of Granular Cell Tumors that Clinically Mimicked Hypertrophic Scars and Keloids

Mamiko Tosa¹, Shin-ichi Ansai² and Rei Ogawa¹

¹Department of Plastic, Reconstructive & Aesthetic Surgery, Nippon Medical School, Tokyo, Japan
²Division of Dermatology and Dermatopathology, Nippon Medical School Musashi Kosugi Hospital, Kanagawa, Japan

We report two cases of granular cell tumors (GCTs) arising on rare sites, namely, the nape and umbilicus. While GCTs have a very characteristic histology, their clinical signs and symptoms are non-specific. Therefore, it is extremely difficult to make a diagnosis of GCT on the basis of clinical findings only. The two cases reported here were clinically similar to hypertrophic scars and keloids, respectively. Skin surgeons should remember that GCTs are an important differential diagnosis from hypertrophic scars and keloids.

J Nippon Med Sch 2018; 85: 279-282

Keywords
granular cell tumor, subcutaneous tumors, soft tissue

Correspondence to
Mamiko Tosa, MD, Department of Plastic and Reconstructive Surgery, Nippon Medical School Hospital, 1-1-5 Sendagi, Bunkyou-Ku, Tokyo 113-8603, Japan
tosa-m@nms.ac.jp

Received, March 6, 2018
Accepted, March 12, 2018