Ultrasonographic dimensions of the vertical span of the fetal iliac bone and relationship with some fetal parameters.
Using fetal ultrasonography, disorders of developmental delay and congenital malformations are promptly diagnosed. Skeletal abnormalities are relatively easy to notice once standards of growth are established. The iliac bone is frequently affected in skeletal problems, yet it has not been extensively studied. In this study, a total of 296 fetuses were evaluated and the vertical span of the iliac bone was measured in the oblique coronal plane. The size of the fetal iliac bone (in cm) was calculated according to the cubic regression formula y = -4.6891 + 0.5757x (gestational age in weeks) - 0.0159x2 + 0.0001x3. Standards of normal vertical growth of the iliac bone were established and it was noted that the humerus/iliac bone and femur/iliac bone ratios were uniform with minimal variation after the 16th gestational week, with mean values (SD) of 1.82 (0.14) and 2.09 (0.15), respectively. The iliac wing may be unaltered and the vertical span may be changed considerably in some skeletal dysplasias. For complete evaluation of the skeletal system and to distinguish between different conditions with different prognoses and outcomes, measurement of the vertical span of the iliac bone as a complementary measurement is recommended.
Kara
S A
SA
Department of Radiology, Fatih University Medical Faculty Hospital, Ankara, Turkey.
Toppare
M F
MF
D005260:Female; D005865:Gestational Age; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging* / Q000196:embryology*; D011247:Pregnancy; D012044:Regression Analysis; D016216:Ultrasonography, Prenatal