Abstract
A linear hyperechoic structure in the cisterna magna, previously described as the straight sinus, was investigated during routine obstetric ultrasound (US) examination. One hundred three fetal US examinations were performed to determine the prevalence and appearance of this finding. Also, US water-bath examination of 18 fixed postmortem specimens and fetuses was performed, and results were correlated with those of gross and microscopic examination of the fetal brain. The structure was identified in 95 (92%) prenatal examinations between 15 and 38 menstrual weeks. It was located posteriorly between the cerebellar hemispheres in the cisterna magna. In those 95 cases in which it was identified, it appeared as a single echogenic line in 31 cases (33%), as two echogenic lines in 47 (49%), or as three or more lines in 17 (18%). When two echogenic lines were identified, they appeared "cystlike" in 17 (18%) of the 95 examinations. Correlation of the gross and histologic findings demonstrated these lines to represent normal subarachnoid septa rather than the straight sinus.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 799-801 |
| Number of pages | 3 |
| Journal | Radiology |
| Volume | 180 |
| Issue number | 3 |
| State | Published - Sep 1991 |
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Keywords
- Brain, US studies, 153.1298
- Fetus, abnormalities, 856.87
- Fetus, central nervous system, 856.874
- Fetus, US studies, 856.1298
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
Cite this
Fetal cisterna magna septa : A normal anatomic finding. / Knutzon, Randy K.; McGahan, John P; Salamat, M. Shahriar; Brant, William E.
In: Radiology, Vol. 180, No. 3, 09.1991, p. 799-801.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fetal cisterna magna septa
T2 - A normal anatomic finding
AU - Knutzon, Randy K.
AU - McGahan, John P
AU - Salamat, M. Shahriar
AU - Brant, William E.
PY - 1991/9
Y1 - 1991/9
N2 - A linear hyperechoic structure in the cisterna magna, previously described as the straight sinus, was investigated during routine obstetric ultrasound (US) examination. One hundred three fetal US examinations were performed to determine the prevalence and appearance of this finding. Also, US water-bath examination of 18 fixed postmortem specimens and fetuses was performed, and results were correlated with those of gross and microscopic examination of the fetal brain. The structure was identified in 95 (92%) prenatal examinations between 15 and 38 menstrual weeks. It was located posteriorly between the cerebellar hemispheres in the cisterna magna. In those 95 cases in which it was identified, it appeared as a single echogenic line in 31 cases (33%), as two echogenic lines in 47 (49%), or as three or more lines in 17 (18%). When two echogenic lines were identified, they appeared "cystlike" in 17 (18%) of the 95 examinations. Correlation of the gross and histologic findings demonstrated these lines to represent normal subarachnoid septa rather than the straight sinus.
AB - A linear hyperechoic structure in the cisterna magna, previously described as the straight sinus, was investigated during routine obstetric ultrasound (US) examination. One hundred three fetal US examinations were performed to determine the prevalence and appearance of this finding. Also, US water-bath examination of 18 fixed postmortem specimens and fetuses was performed, and results were correlated with those of gross and microscopic examination of the fetal brain. The structure was identified in 95 (92%) prenatal examinations between 15 and 38 menstrual weeks. It was located posteriorly between the cerebellar hemispheres in the cisterna magna. In those 95 cases in which it was identified, it appeared as a single echogenic line in 31 cases (33%), as two echogenic lines in 47 (49%), or as three or more lines in 17 (18%). When two echogenic lines were identified, they appeared "cystlike" in 17 (18%) of the 95 examinations. Correlation of the gross and histologic findings demonstrated these lines to represent normal subarachnoid septa rather than the straight sinus.
KW - Brain, US studies, 153.1298
KW - Fetus, abnormalities, 856.87
KW - Fetus, central nervous system, 856.874
KW - Fetus, US studies, 856.1298
UR - http://www.scopus.com/inward/record.url?scp=0025901167&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025901167&partnerID=8YFLogxK
M3 - Article
VL - 180
SP - 799
EP - 801
JO - Radiology
JF - Radiology
SN - 0033-8419
IS - 3
ER -