CASE REPORT: A case of implantation dermatosis that formed a tumor

• Published in: Journal of dermatology Vol. 33; no. 2; pp. 122 - 127
• Main Authors: Kondoh, Akio, Akasaka, Emiko, Yamamoto, Kozo, Mizutani, Kimihiko, Iwashita, Kenichi, Umezawa, Yoshinori, Ohta, Yukinori, Matsuyama, Takashi, Ozawa, Akira
• Format: Journal Article
• Language: English
• Published: 01.02.2006
• ISSN: 0385-2407
• DOI: 10.1111/j.1346-8138.2006.00026.x

A 51-year-old man visited our hospital complaining of a tumor located above his lip. He had been hit on his upper left lip by a chopstick holder 2 months previously. The lesion turned into a tumor and gradually enlarged. The tumor was well circumscribed, smooth and covered with reddish, partially milk-white skin. During surgery to remove the tumor, a piece of a chopstick was found in the subcutaneous tissue, and a diagnosis of implantation dermatosis (ID) was made. On histology, the tumor appeared as an abscess that had increased fibroblasts, small vessels and a large number of neutrophils. In the Japanese published work, we found 86 cases of ID; three were similar to our case and had been clinically diagnosed as adnexal tumors. There were also six cases that showed abscess formation similar to our case on histology. In a survey of the published work from other countries, there were 44 ID cases. There were no common features found among the cases reported in the published work.