Objective: To determine the incidence of primary malignant tumors of the oral cavity in Jordan and to compare the incidence rates among Jordanian population with world standard population. Methods: A retrospective study was conducted during the period 2000 and 2007, on 156 cases with histological diagnosis of primary malignant tumors of the oral cavity. The cases were registered and received by active case finding from the maxillofacial departments at the Royal Medical Services Hospitals, Hospitals of the
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