primary intraosseous carcinoma of the maxilla

a primary intraosseous carcinoma (pioc) is a squamous cell carcinoma arising within the  jawbone andshould be differentiated from a malignant ameloblastoma.  it  is not due to arising from an odontogenic cyst or tumor. the possibility of the lesion being  a metastasis fromanotherprimary site should be considered, and excluded by a careful history and examination. the diagnosis of a pioc is rare, but it is often worth considering in any differential diagnosis of  jawradiolucency.  the  prognosis  associated  with  primary  intraosseous  carcinoma of  the  jaws  is  poor  and needs for aggressive treatment. it is common for these patients to present with apparent routine dental.this paper reports a case pioc of the maxilla. the patient was a 68-year-old woman with a chief complaint of swelling of her hard palate.