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27:
A radiograph of a left hip joint, which reveals a thin, curvilinear lucent line parallel to the cortical margin of the femoral head, in a patient with avascular necrosis.
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head. Usually, this sign indicates a high likelihood of collapse of the affected bone. The crescent sign may be best seen in an abducted (frog-legged) position.
530:
257:
191:
Norman, A.; Bullough, P. (1963). "The
Radiolucent Crescent Line--An Early Diagnostic Sign of Avascular Necrosis of the Femoral Head".
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47:. It usually occurs later in the disease, in stage III of the four-stage Ficat classification system. It appears as a curved
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Kenzora, J. E.; Glimcher, M. J. (1985). "Pathogenesis of idiopathic osteonecrosis: The ubiquitous crescent sign".
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77:. When the trabeculae experience stress leading to microfractures and collapse, the crescent sign appears.
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219:"Rheumatology Image Bank: Avascular Necrosis, Crescent Sign: Ficat Stage III, Hip"
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The crescent sign may be seen with other bone diseases, such as shear
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Pappas, J. N. (2000). "The musculoskeletal crescent sign".
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and repair processes that occur during avascular necrosis.
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occurs at a margin where new bone is placed over dead
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193:Bulletin of the Hospital for Joint Diseases
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54:line that is often found on the proximal
158:The Orthopedic Clinics of North America
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7:
417:Fat pad sign/Sail sign of the elbow
65:The crescent sign is caused by the
531:Musculoskeletal radiographic signs
132:10.1148/radiology.217.1.r00oc22213
14:
510:Hyperdense middle cerebral artery
1:
170:10.1016/S0030-5898(20)30435-1
39:is a finding on conventional
16:Not to be confused with the
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15:
480:Pneumatosis intestinalis
43:that is associated with
361:Traction bronchiectasis
341:Sail sign of the chest
28:
336:Peribronchial cuffing
26:
389:Canga's bead symptom
422:Osteopathia striata
45:avascular necrosis
29:
518:
517:
465:Hot quadrate sign
311:Air crescent sign
288:Dense artery sign
18:air crescent sign
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432:Gastrointestinal
366:Tree-in-bud sign
316:Deep sulcus sign
283:Aortic unfolding
267:Radiologic signs
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399:Musculoskeletal
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371:Westermark sign
356:Thumbprint sign
346:Silhouette sign
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164:(4): 681–696.
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71:Osteosclerosis
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470:Mumoli's sign
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37:crescent sign
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500:Neurological
475:Omental cake
412:Fabella sign
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351:Steeple sign
331:Kerley lines
326:Hampton hump
222:. Retrieved
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440:Cupola sign
303:Respiratory
52:radiolucent
49:subchondral
41:radiographs
381:Urogenital
199:: 99–104.
88:References
75:trabeculae
293:Halo sign
120:Radiology
82:fractures
33:radiology
525:Category
205:14048829
140:11012446
67:necrotic
224:26 June
178:4058896
60:humeral
56:femoral
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35:, the
226:2012
201:PMID
174:PMID
136:PMID
166:doi
128:doi
124:217
58:or
31:In
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148:^
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96:^
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259:e
252:t
245:v
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20:.
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