Absence of the spleens in conjoined twins: a diagnostic clue of laterality defects Radiological study of historical specimensReportar como inadecuado




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Pediatric Radiology

, Volume 42, Issue 6, pp 653–659

First Online: 12 January 2012Received: 01 July 2011Revised: 12 September 2011Accepted: 17 October 2011

Abstract

BackgroundLaterality defects are quite common in thoracoileopagus and parapagus dicephalus but rare in other types of conjoined twins.

ObjectiveTo present the presumed laterality defects in cephalothoracoileopagus and prosopothoracoileopagus conjoined twins, based on the unilateral or bilateral absence or duplication of the spleen.

Materials and methodsThree human anatomical specimens of craniothoracoileopagus CTIP twins and one of prosopothoracoileopagus PTIP twins were investigated. The specimens were part of the Museum Vrolik collection of the Department of Anatomy and Embryology of the Academic Medical Centre, University of Amsterdam, The Netherlands. The specimens were taken out of their jars and scanned with multidetector CT and volumetric T2-weighted MRI at 1.5 T.

ResultsThe internal anatomy of the specimens was largely in accordance with previous reports. However, there was no recognisable spleen in the right twin in one CTIP specimen, in the left twin in one other CTIP specimen, and in both twins in the third CTIP specimen and in the PTIP specimen.

ConclusionAsplenia and polysplenia are considered reliable indicators of right and left isomerism, respectively. However, three of our four specimens had laterality patterns that did not correspond with those previously reported. Since no other parameters of laterality defects could be verified in these specimens, we concluded that asplenia was unlikely to be caused by laterality defects.

KeywordsConjoined twins Laterality defects Imaging Historical specimen  Download fulltext PDF



Autor: R. J. Oostra - N. Keulen - T. Jansen - R. R. van Rijn

Fuente: https://link.springer.com/



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