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Diagnostic ultrasound ( PDFDrive )

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CHAPTER 39 The Fetal Urogenital Tract 1349

A

B

C

FIG. 39.16 Autosomal Recessive Polycystic Kidney Disease (Early Presentation). (A) and (B) Coronal and transverse scans of a 22-week

fetus show bilateral large, diffusely hyperechoic kidneys (calipers) with loss of corticomedullary differentiation. (C) Photograph of cut surface of

kidney shows a spongelike appearance. The small cysts are dificult to see. (D) Photograph of whole-mount section shows small cysts that tend

to be arranged perpendicular to the renal capsule (hematoxylin-eosin stain). (C and D courtesy of Sarah Keating, MD, Department of Pathology

and Laboratory Medicine, Mount Sinai Hospital, Toronto.)

D

A

B

FIG. 39.17 Autosomal Recessive Polycystic Kidney Disease (Third-Trimester Presentation). (A) Coronal scan of a 30-week fetus shows

markedly enlarged kidneys (calipers), with a hypoechoic peripheral rim surrounding the centrally increased echogenicity. Right kidney measures

7.5 cm in length and left kidney 8 cm. (B) Coronal scan of a different fetus at 31 weeks’ gestation shows markedly enlarged kidneys (calipers),

with hyperechoic pyramids (arrowheads), resulting in “reversed corticomedullary differentiation.”

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