Case report: A 26-year-old woman, gravid 3, para 2, underwent ultrasound examination at 33 weeks of gestation. Previous scan at 13 and 20 weeks, performed at another institution, were reported as normal. The patient had neither familiar nor congenital malformations, and she refused undergoing an amniocentesis.
The 2D and 3D ultrasonographic images showed a single bone in the right forearm, it being the ulna, and an apparent radial proximal bone. The ulna appeared arcuated. The homolateral hand presented a radius-palmar deviation, being the carpus clearly seen but not the rest of the fingers, nor the thumb. The left upper limb showed no echographic alterations. No structural associated malformations were found neither in the lower limbs nor in any other fetal organs. The kidneys were in their usual place. Polyhydramnios was detected, having a 20cm AFI for a 12cm average at 33 weeks, as the only associated alteration.
Post-natal radiographic studies confirmed the findings described on the right upper limb. Post-natal ultrasonographic test did not show any associated malformations at renal level.
These is a view at 33 weeks, including a 4D volume.
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