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| Prenatal Ultrasonographic Findings of Multicystic Dysplastic Kidney: Emphasis on Cyst Distribution |
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| Min Hoan Moon, M.D. Jeong Yeon Cho, M.D. |
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| Department of Radiology, Samsung Cheil Hospital, Sungkyunkwan University School of Medicine |
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| PURPOSE : To characterize the ultrasonographic findings of multicystic dysplastic kidney on prenatal ultrasonography
(US) with a special emphasis on the distribution of cysts.
MATERIALS and METHODS : From January 1998 to March 2003, medical records of sixty two subjects with multicystic
dysplastic kidney diagnosed on prenatal US examination were retrospectively reviewed, and forty three patients
confirmed either by pathology or postnatal follow-up US were selected for this study. US assessment included
the time of diagnosis, laterality, size of the multicystic dysplastic and contralateral normal kidneys, distribution
of cysts and associated anomalies. The distribution of cysts was categorized as subcapsular and random distribution,
and interobserver agreement was determined using the cross table analysis. The largest multicystic and
contralateral normal longitudinal diameters were measured, and the data were plotted on the normal reference
chart.
RESULTS : Multicystic dysplastic kidney was left sided in 55.8%, right sided in 34.8% and bilateral in 9.3%.
Subcapsular distribution of cysts was observed in 68.2% (n=15) for radiologist 1 while 59.1% (n=13) for radiologist
2, showing an excellent interobserver agreement (k=0.697). The longitudinal diameter of the multicystic
dysplastic kidney was above 95 percentile in 68%. Meanwhile, the diameter of the contralateral normal kidney
was more commonly normal, 70%. Fetal karyotyping was done in 18 cases including 2 cases with associated
major anomalies, but karyotyping was all normal.
CONCLUSION : On prenatal US, subcapsular distribution of cysts in multicystic dysplastic kidney is more common
than random distribution. This characteristic distribution of cysts may be helpful in the prenatal diagnosis of
multicystic dysplastic kidney. |
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| Keyword : Fetus, US Fetus, genitourinary system Kidney, abnormalities |
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pdf파일 : 133-138 문민환.pdf 
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> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2003 ; 22 (3) : p.133-138
