顎裂部骨移植後に発生した封入嚢胞の１例

Abstract

This report describes a rare case of inclusion cyst occurring after secondary bone grafting (SBG) in the alveolar cleft, with a brief discussion. An 18-year-old girl was referred to our hospital for evaluation of a repaired congenital alveolar cleft and re-bone-grafting on February 21, 2007. According to her medical history, operative closure of the cleft lip and palate was performed at an other hospital. In addition, SBG was performed at the age of 9 years 9 months. At the first visit to our department, the bone-bridge was not sufficient for orthodontic tooth movement, despite SBG. X-ray films revealed not only postoperative resorption of the transplanted bone, but also a cystic lesion with a relatively well circumscribed margin at the midline of the maxilla. On March 20, extirpation of the cystic lesion and re-bone grafting was performed. The cystic lesion, measuring8 mm in diameter, was removed. The surgical area did not communicate with the nasal cavity, and alveolar bone grafting was done successfully. Histopathological findings indicated a pseudocyst associated with a foreign-body reaction. Immunohistochemistry for hard a -keratins detected immunoreactivity on the foreign bodyin the cystic space. These findings suggested a so-called inclusion cyst occurring after SBG.