TI : A case report of primary intra-osseous carcinoma of the maxilla
AU : Park IW*, Choi SC**, Lee YH**, Park TW**, You DS**
AD : Department of Oral and Maxillofacial Radiology, College of Dentistry,Kangnung National University* Department of Oral and Maxillofacial Radiology, College of Dentistry, Seoul National University**
SO : JKOMFR. 1997;27(2):135-144
ISSN : 1225-049X
PY : 1997
LA : KOREAN
CP : KOREA
AB : The primary intra-osseous carcinoma (PIOC) is a very rare lesion. PIOC is an odontogenic carcinoma defined as a squamous cell carcinoma arisinig within a jaw having no initial connection with the oral mucosa, and presumably developing from residues of the odontogenic epithelium. The authors diagnosed a 51-year-old female as primary intra-osseous carcinoma after undergoing clinical, radiological and histological examinations.
The characteristics were as followed :
1. The patient complained of gingival bleeding on the premolar area in the left maxilla
2. The conventional radiograms showed a relatively well-defined unilocular radiolucent lesion from the mesial aspect of the upper left canine to the mesial aspect of the upper left 1st molar. The 2nd premolar was separated from the 1st molar and the floor of the maxillary sinus was elevated by the lesion. There was a external root resorption of the upper left canine , the 1st premolar, and the 2nd premolar. 3. On the computed tomograms, the osteolytic bony lesion expanded the cortical plate of the left maxilla and displaced the margin of the left maxillary sinus upwards. But the bony lesion was separated from the maxillary sinus by a bony septum.
4. Bone scintigram with 99mTc demonstrated the increased uptake in the left maxilla. Sonograms in the neck area and chest P-A radiogram didn't show any abnormalities.
5. Histologically, the tumor islands infiltrating into the surrounding bone increased in alveolar pattern, composed of the malignant cells, and there was a necrosis in the center of the tumor islands.