Whereas calcium deposition in soft tissues is not uncommon, highly-structured, identified as mature cancellous bone within soft tissues is not frequent. Here, we report an usual case of mature cancellous bone in cheek subcutaneous tissue in 15-year-old Korean male. Microscopically the cancellous bone was encompassed by epithelial cells, which was confirmed by immunohistochemical staining with cytokeratin AE1/3. The present mature cancellous bone in subcutaneous tissue could be originated from oral epithelium.

• 장효원(연세대학교 치과대학 구강악안면외과학교실) | Hyo Won Jang
• 윤태균(연세대학교 치과대학 구강악안면외과학교실) | Tae Gyun Youn
• 이바다(연세대학교 치과대학 구강악안면외과학교실) | Ba Da Lee
• 최은주(연세대학교 치과대학 구강악안면외과학교실) | Eun Ju Choi
• 차용훈(연세대학교 치과대학 구강병리학교실, 구강종양연구소) | Yong Hoon Cha
• 김현실(연세대학교 치과대학 구강병리학교실, 구강종양연구소) | Hyun Sil Kim correspondence