A case of pencil-core granuloma diagnosed with ultrasonography

Asuka Shouno, Junichi Hachisuka, Takeshi Nakahara, Yoichi Moroi, Masutaka Furue

Research output: Contribution to journalArticlepeer-review


A 54-year old woman had crashed a pencil into her right palm when she was an elementary school student. A bluish flat lesion was left without any symptoms. However, the lesion had recently become elevated. Ultrasonography revealed a 15 x 11 mm hypoechoic tumor, with a 10 mm hyperechoic linear material inside the tumor, characteristic features of a pencil-core granuloma. The tumor was surgically removed and a pencil core was found inside the tumor. Histologic examination showed a fibrotic granuloma with dark pigmented granules that is consistent with pencil-core granuloma. As the clinical presentation of pencil-core granuloma is sometimes similar to malignant melanoma, ultrasonographic imaging may be a useful tool for an accurate diagnosis.

Original languageEnglish
Pages (from-to)578-580
Number of pages3
JournalNishinihon Journal of Dermatology
Issue number6
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Dermatology


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