Osseous Metaplasia In Adenocarcinomo Of The Rectum: A Case Report

Osseous metaplasia is a rare feature to be seen in any type of tumor. Very few cases of osseous metaplasia in benign or malignant tumors of the gastrointestinal tract have been reported. Majority of these cases are mucin secreting adenocarcinomas. In all these cases osseous metaplasia is an incidental finding on microscopic examination and there are no specific clinical features or tests which will indicate osseous metaplasia. Etiopathogenesis of osseous metaplasia is not well known but Bone morphogenic proteins(BMP) are known to play an important role in the pathogenesis of this condition. Awareness of this condition is necessary to avoid overdiagnosis of bone invasion in malignant tumors.