口腔颌面医学影像诊断学（中山大学）5.囊肿与肿瘤.pptVIP

Radiographic Features More commonly are unilateral Maxilla-favoured (twice as often as the mandible), ill defined , maxillary sinus blocking Mandible-rarely, part of the jaws， ill-defined, expanding Finger-print pattern Ground-glass pattern (granular appearance ) Orange-peel pattern (resembling the surface of an orange) Cotton wool pattern ( wispy arrangement amorphous) Cyst-like pattern MAXILLOFACIAL MALIGNANT TUMORS Malignant tumors of the jaws Osteosarcoma Chondrosarcoma Fibrosarcoma Primary intraosseous carcinoma Metastatic malignancy Osteosarcoma Radiographic features 1) The posterior areas (mandible and maxilla), ramus is commomly affected. 2) Ill-defined border in most instances. 3) Usually radiolucent with no peripheral sclerosis or encapsulation . NON-ODONTOGENIC BENIGN TUMOR OF JAWS  cemento-ossifying fibroma Clinical features: Young adults,mandible more than maxilla Slowly growing and asymptomatic Deformity appears later Radiographic features ： Most commonly in the mandible, typically inferior to the premolars and molars and superior to the inferior alveolar cannal Well defined lucency,may have opaque foci A thin, radiolucent line surrounding (representing a fibrous capsule) A mixed radiolucent-radiopaque density with a pattern that depends on the amount and form of the manufactured calcified material OsteomaClinical features： Tend to occur in childhood and stop growing in adult Common in maxillary tuberosity ,mandibular angle ,condyle process Slowly enlarging ;painless ; Asymmetry by bony, hard swelling on the jaw Radiographic features ： Well-defined borders Uniformly radiopaque: composed solely of compact bone Trabecular structure: containing cancellous bone Central Hemangioma of jaw Radiographic features : 1) The most commom site:the posterior mandible and ramus 2) Multicular radiolucency or honeycomb pattern (composed of small circular radiolucent sp