骨和软组织肿瘤7.pdf

Bone and Soft Tissue Tumor and Tumor-like Disease Radiological examination is essential before any attempt at diagnosis of a bone tumor is made. The diagnosis of a bone tumor requires the cooperation of the clinician, radiologist and pathologist. Radiology provides the earliest useful diagnostic evidence of the nature of a bony lesion. ¡Radiological assessment of bone tumors location, rate of growth, number， matrix mineralization, periosteal reaction, regularity of the margin, soft tissue mass age of presentation，incidence rate， symptom and physical sign，the result of laboratory examination Differentiation of Benign Bone Tumors from the Malignant Benign Malignant Development Slowly. No adjoining tissue rapidly. Adjoining tissue or extension or only displacement organs extensions common. by pressuring. Metastasis No Yes Local bone Expanding lesion with well- Permeating destructive pattern changes defined and sharp endosteal with ill-defined margin and margin. Cortex thinned and wide zone of transition. expanded with continuity. Adjacent cortex frequently destroyed. Probable tumor bone formation. Reactive Absence or presence after Variousness frequently with periosteal pathological fracture without destruction. bone destruction. Adjoining Absence or mass with well- Permeating soft tissue mass soft tissue defined margin with ill-defined margin. changes Benign Bone Tumor 生骨组织 ¡ 良性： Ø骨样骨瘤 Ø 良性骨母细胞瘤 骨样骨瘤 ¡ 下肢胫