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DOI: 10.3315/jdcr.2009.1033 38 Dermoscopy of eccrine poroma with calcification Yohei Nishikawa, Takahide Kaneko, Noriko Takiyoshi, Takayuki Aizu, Koji Nakajima, Yasushi Matsuzaki, Hajime Nakano, Daisuke Sawamura Department of Dermatology, Hirosaki University Graduate School of Medicine, Hirosaki 036-8182, Japan Corresponding author: Abstract Daisuke Sawamura Background: Eccrine poromas are relatively common slow-growing benign Department of Dermatology, Hirosaki solitary adnexal tumors originating from the intraepidermal portion of the eccri- University School of Medicine ne sweat duct (acrosyringium). Dystrophic calcification is rarely found in le- sions of eccrine poroma, and only 2 cases of eccrine poroma with calcification 5 Zaifu-cho, Hirosaki 036-8562, Japan have been reported thus far. In the present report, we describe another case of E-mail: email@example.com eccrine poroma with calcification occurring in the palm of the hand. Also, we show dermoscopic features of this case. Main Observations: A 73-year-old man with hemiparesis, who had a 10-year Key words: history of tumor on his right palm, which was occasionally injured by a walking adnexal tumors, calcification, dermo- crutch, causing bleeding and ulceration. Physical examination revealed a pig- scopy, eccrine gland, local tissue inju- mented dome-shaped tumor. Dermoscopic analysis revealed glomerular ves- ry, Pinkus type sels, multiple pink-white structureless areas, and lacunae. Histological exami- nation revealed that the tumor was composed of cords of tumor cells extending from the epidermis into the dermis. These were uniformly cuboidal cells with round, basophilic nuclei and dense vascular stromas with telangiectasia. The tumor showed cystic structures and calcification. The patient was diagnosed with Pinkus-type eccrine poroma on the basis of histological findings. Conclusion: Although cutaneous neoplasms commonly associated with cal- cification are of follicular origin, it is known that dystrophic calcification may be triggered also in tumors of eccrine origin by multiple factors, including mecha- nical injury. Dermoscopy may be helpful in establishing clinical diagnosis of calcified eccrine poromas. Introduction he sustained intracerebral hemorrhage 6 years ago, and
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