Umbilical vein aneurism

From: Wolfgang Moroder, MD (womorode@tin.it)
Mon Jan 14 03:52:32 2002


1) I have noticed umbilical vein aneurysms with bidirectional flow in cases of hypercynetic placental blood flow and relative hypercynetic venous return in a twin with placental chorioangioma and its a-v shunt and in a case of bilobate placenta. 2) What is AAA? 3) I did not find the picture you mention (wrong URL?)

Ciao Wolfgang

At Mon, 14 Jan 2002, Martin Necas wrote: >
>In my opinion, intraabdominal umbilical vein aneurysms or varices are not
>uncommon. We see them about every six months, most of them small. I have
>never seen adverse outcome with these or associated anomalies, although in
>older studies it seemed to worry the sonologists and some reports of adverse
>outcomes have been reported. Extremely rarely, intraluminal thrombus can be
>seen in the dilated umbilical vein.
>
>Normal umbilical vein measures 3mm in diametre at 15 weeks and steadily
>increases in diameter in a linear fashion to 8mm at 36+ weeks.
>
>I think bidirectional flow pattern on spectral doppler is very likely due to
>swirling of the venous flow in the dilated portion of the vein, much like
>the ying-yang flow seen in AAA.
>
>A nice picture of an umbilical vein varix is attached.
>
>Yours,
>
>--
>Martin Necas.
>

--
Wolfgang Moroder, MD
Prenatal Unit
Bolzano General Hospital  Italy



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