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Case Reports
. 2017 Jun;43(6):1067-1070.
doi: 10.1111/jog.13313. Epub 2017 Apr 19.

Bilateral femoral neck fractures resulting from pregnancy-associated osteoporosis showed bone marrow edema on magnetic resonance imaging

Kyoko Kasahara  1   2 , Nobuyuki Kita  1 , Taku Kawasaki  3 , Shinsuke Morisaki  4 , Hiroko Yomo  1 , Takashi Murakami  2
Affiliations
Case Reports

Bilateral femoral neck fractures resulting from pregnancy-associated osteoporosis showed bone marrow edema on magnetic resonance imaging

Kyoko Kasahara et al. J Obstet Gynaecol Res. 2017 Jun.

Abstract

Femoral neck fractures resulting from pregnancy-associated osteoporosis is a rare condition. Herein, we report an undoubted case of pregnancy-associated osteoporosis in a 38-year-old primiparous patient with pre-existing anorexia nervosa who suffered bilateral femoral neck fractures in the third trimester and early post-partum period. Magnetic resonance imaging revealed femoral neck fractures as well as diffuse marrow edema involving both femoral heads, which are considered under ordinary circumstances as characteristic imaging findings of transient osteoporosis of the hip. Based on our experience, we propose that pregnancy-associated osteoporosis might be present in femoral neck fractures attributed to transient osteoporosis of the hip in pregnancy. Conversely, bone status should be carefully and accurately estimated in cases of potential transient osteoporosis of the hip in pregnancy to reduce future fracture risk.

Keywords: anorexia nervosa; bone marrow edema; femoral neck fracture; osteoporosis; pregnancy.

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Figures

Figure 1
Figure 1
Signal intensity is (a) decreased in bilateral proximal femora on T1‐weighted imaging and (b) increased on short‐tau inversion recovery T2‐weighted imaging.
Figure 2
Figure 2
Radiography of the hips shows fractures of the bilateral femoral necks.
See this image and copyright information in PMC

References

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