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British Journal of Radiology (2007) 80, e278-e282
© 2007 British Institute of Radiology
doi: 10.1259/bjr/78279821
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Hydatid cyst of the cardiac interventricular septum: report of two cases

S K Muthu, DMRD 1 A Thiagarajan, DMRD 2 S Govindarajan, DMRD, DNB 2 C M A Coutinho 3 W J Gunawardena 3 and T S Swaminathan, MD, DMRD, FICR 2

1 Hammersmith Hospital NHS Trust, London, UK, 2 Barnard Institute of Radiology, Madras Medical College, 3 Royal Preston Hospital, Preston, UK


Figure 1
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  		Figure 1. Echocardiography shows a large well-defined non-calcified cystic lesion with thin internal septations in an intramyocardial location at the junction of the right ventricle and the interventricular septum, producing a honeycomb or cartwheel appearance.

 

Figure 2
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  		Figure 2. Contrast-enhanced axial MDCT section shows large multiloculated lesion with a "cartwheel-like" appearance in the lower interventricular septum bulging into the right ventricular cavity.

 

Figure 3
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  		Figure 3. AxialT2 weighted MRI section shows a large septated lesion in the interventricular septum with water-like hyperintense contents and relatively hypointense intervening septae. Small fluid-filled daughter cysts are also noted in the left lower lobe.

 

Figure 4
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  		Figure 4. Pre-operative photograph shows a glistening white thick-walled lesion in the exposed right ventricular cavity arising from the lower part of the interventricular septum.

 

Figure 5
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  		Figure 5. (a) MDCT axial section shows a large multiseptated cystic lesion with hypodense contents in the lower intraventricular septum, extending to the cardiac apex. (b) MDCT coronal reformation shows the multiloculated cyst in the lower part of the interventricular septum extending to the cardiac apex.

 

Figure 6
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  		Figure 6. AxialT2 weighted MRI section reveals a multiloculated cyst with hyperintense contents and relatively hypointense septae bulging into, and occupying most of, the left ventricular cavity.

 

Figure 7
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  		Figure 7. Photomicrograph(x50; haematoxylin-eosin stain) of the hydatid cyst wall shows a characteristic non-nucleated laminated membrane composed of innumerable laminations.

 




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