骨骼肌肉系统疾病液液平面征
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metaphysis of long tubular bones,but they are also found within the posterior elements of the spine.
Imaging manifestation
• 偏心性膨胀性骨质破坏，常伴骨性分隔，甚者 可呈气球样，病变内缘常完整。Eccentric,
16 12
<1/3 >Байду номын сангаас/3
1/3~2/3 entire
二.病变的种类
(typies of the lesion)
（一）骨病变： • 动脉瘤样骨囊肿Aneurysmal Bone Cyst,ABC • 单纯性骨囊肿Simple Bone Cyst • 骨纤维异常增殖症Fibrous Dysplasia • 骨内脂肪瘤Intraosseous Lipoma • 软骨母细胞瘤Chondroblastoma • 毛细血管扩张型骨肉瘤Telangiectatic
• 2.9％～11.2%的骨病变中可出现液-液平面。
Prevalence of FFL in bone tumors is 2.9％～11.2%.
• T2WI上观察佳。Most conspicuous on T2WI. • 常与出血及肿瘤坏死有关。Related to prior
hemorrhage or tumor necrosis.
• 85%可见液-液平面，常为多个液平，是ABC 发展到中期或晚期阶段的典型表现。FFLs can
be seen in 85% patients ,and are typical of the mid or late phase of development of the ABC.
Imaging manifestation
• CT上，各层CT值的不同形成了FFL。The
difference in the density of these layers can be observed on CT imaging.
• MRI上，各层信号上的差异形成了FFL。The
difference in the signal characteristics of these layers allow for visualization of the FFL on MRI.
subperiosteal location can demonstrate aggressive radiographic appearance and edema of adjacent soft tissues mimicking telangiectatic osteosarcoma
Osteosarcoma
二、病变的种类
(typies of the lesion)
（二）软组织病变 • 血肿 Hematoma
• 肌间血管瘤 Intramuscular Hemangioma
• 动静脉畸形 Arteriovenous Malformation • 关节周围钙质沉着 Periarticular Calcinosis
单发FFL (single FFL) :8 ; 多发FFLs(Multiple FFLs) :75。 良性benign 恶性malignant
非肿瘤
nonneoplastic
合计
33 22
<1/3 10（30％） 22（67％） 1（3％） 1/3~ 13（59％） 8（36％） 1（5％） 2/3 >2/3 13（81％） 3（19％） 0 entire 12 0 0 结论：>2/3,大部分为良性病变
• 软组织平滑肌瘤 Soft Tissue Leiomyoma
• 肉瘤 Sarcoma
动脉瘤样骨囊肿
(aneurysmal bone cyst,ABC)
• 薄壁分隔、血性液体充盈多房房腔为特点的膨 胀性骨病变。ABC is an expansile lesion containing
mixed multiple thin walled,blood filled cystic cavities.
骨骼肌肉系统疾病－－液 液平面征
（Musculoskeletal Lesions With Fluid-Fluid Level）
Department of Radiology the 2nd affiliated hospital of Sun yat-sen university
一.概述（overview）
• 创伤是引发该病的原因之一。Trauma has been
indicated as a cause.
• 常伴发于其他骨病变。Often arises secondary to
apreexisting lesion.
• 好发年龄在5-20岁，长管状骨的干骺端多见， 也可见于脊柱附件。Most commonly occur within the
• 16%的ABC可发生于骨表面，分为骨膜下型、 骨皮质型及混合型。Sixteen percent of ABC arise from
surface of bones，including subperiosteal; cortical ;mixed.
• 骨膜下型ABC常具有侵袭性，可致周围软组织 水肿，易误诊为毛细血管扩张型骨肉瘤。ABCs in
A thin, well-defined rim of low-signal intensity about the ABC is common. There is inhomogeneity of the signal intensity, with individual lobules having markedly different signal characteristics.
osteolytic lesion, often with septations, the cortical surface expanded or ballooned,and the inner margin is well defined,
• MRI上，ABC常呈薄而完整的低信号边缘，病 灶内信号不均匀，房腔间信号可存在显著差异。
Imaging manifestation
• 偏心性膨胀性骨质破坏，常伴骨性分隔，甚者 可呈气球样，病变内缘常完整。Eccentric,
16 12
<1/3 >Байду номын сангаас/3
1/3~2/3 entire
二.病变的种类
(typies of the lesion)
（一）骨病变： • 动脉瘤样骨囊肿Aneurysmal Bone Cyst,ABC • 单纯性骨囊肿Simple Bone Cyst • 骨纤维异常增殖症Fibrous Dysplasia • 骨内脂肪瘤Intraosseous Lipoma • 软骨母细胞瘤Chondroblastoma • 毛细血管扩张型骨肉瘤Telangiectatic
• 2.9％～11.2%的骨病变中可出现液-液平面。
Prevalence of FFL in bone tumors is 2.9％～11.2%.
• T2WI上观察佳。Most conspicuous on T2WI. • 常与出血及肿瘤坏死有关。Related to prior
hemorrhage or tumor necrosis.
• 85%可见液-液平面，常为多个液平，是ABC 发展到中期或晚期阶段的典型表现。FFLs can
be seen in 85% patients ,and are typical of the mid or late phase of development of the ABC.
Imaging manifestation
• CT上，各层CT值的不同形成了FFL。The
difference in the density of these layers can be observed on CT imaging.
• MRI上，各层信号上的差异形成了FFL。The
difference in the signal characteristics of these layers allow for visualization of the FFL on MRI.
subperiosteal location can demonstrate aggressive radiographic appearance and edema of adjacent soft tissues mimicking telangiectatic osteosarcoma
Osteosarcoma
二、病变的种类
(typies of the lesion)
（二）软组织病变 • 血肿 Hematoma
• 肌间血管瘤 Intramuscular Hemangioma
• 动静脉畸形 Arteriovenous Malformation • 关节周围钙质沉着 Periarticular Calcinosis
单发FFL (single FFL) :8 ; 多发FFLs(Multiple FFLs) :75。 良性benign 恶性malignant
非肿瘤
nonneoplastic
合计
33 22
<1/3 10（30％） 22（67％） 1（3％） 1/3~ 13（59％） 8（36％） 1（5％） 2/3 >2/3 13（81％） 3（19％） 0 entire 12 0 0 结论：>2/3,大部分为良性病变
• 软组织平滑肌瘤 Soft Tissue Leiomyoma
• 肉瘤 Sarcoma
动脉瘤样骨囊肿
(aneurysmal bone cyst,ABC)
• 薄壁分隔、血性液体充盈多房房腔为特点的膨 胀性骨病变。ABC is an expansile lesion containing
mixed multiple thin walled,blood filled cystic cavities.
骨骼肌肉系统疾病－－液 液平面征
（Musculoskeletal Lesions With Fluid-Fluid Level）
Department of Radiology the 2nd affiliated hospital of Sun yat-sen university
一.概述（overview）
• 创伤是引发该病的原因之一。Trauma has been
indicated as a cause.
• 常伴发于其他骨病变。Often arises secondary to
apreexisting lesion.
• 好发年龄在5-20岁，长管状骨的干骺端多见， 也可见于脊柱附件。Most commonly occur within the
• 16%的ABC可发生于骨表面，分为骨膜下型、 骨皮质型及混合型。Sixteen percent of ABC arise from
surface of bones，including subperiosteal; cortical ;mixed.
• 骨膜下型ABC常具有侵袭性，可致周围软组织 水肿，易误诊为毛细血管扩张型骨肉瘤。ABCs in
A thin, well-defined rim of low-signal intensity about the ABC is common. There is inhomogeneity of the signal intensity, with individual lobules having markedly different signal characteristics.
osteolytic lesion, often with septations, the cortical surface expanded or ballooned,and the inner margin is well defined,
• MRI上，ABC常呈薄而完整的低信号边缘，病 灶内信号不均匀，房腔间信号可存在显著差异。