halo sign


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Related to halo sign: Reversed Halo Sign

ha·lo sign

elevation of the subcutaneous fat layer over the fetal skull in a dead or dying fetus; said to be the most common radiologic sign of fetal death.

halo sign

Etymology: Gk, halos, circular floor; L, signum, mark
a halo effect produced in the radiograph of the fetal head between the subcutaneous fat and the cranium. It is said to be indicative of intrauterine death of the fetus.
A vague radiolucency imparted by the dense fibrous capsule of an ovarian dermoid cyst—mature teratoma, separating different sharply circumscribed tissue densities, often recognised by plain films of the lower abdomen

ha·lo sign

(hā'lō sīn)
Elevation of the subcutaneous fat layer over the fetal skull in a dead or dying fetus; said to be the most common radiologic sign of fetal death.
References in periodicals archive ?
In the present study MDCT findings in 37 HSCT patients with neutropenia and antibiotic-resistant FUO, and clinically suspected IPA were retrospectively evaluated via in order to detect the existence of focal pulmonary lesions, the halo sign, and vascular occlusion.
A pulmonary nodule with the halo sign observed with high-resolution CT is an important and early sign of IPA; however, the halo sign is a non-specific imaging finding that may be observed in other diseases (7), (8).
Pitfalls associated with interpretation of the fat halo sign specifically involve intestinal distension.
In conclusion: the presence of the fat halo sign may in the absence of clinical and radiological features of inflammatory bowel disease represent a normal finding that may also be related to obesity.
The density of the intramural stratum of the halo sign varied from -75 to +33 Hounsfield units," Dr.
The halo sign in computed tomography images: differential diagnosis and correlation with pathology findings.
Finding Pediatric (N=9) Adult (N=7) Nodule without halo sign 3 (33.