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Fig. 2 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 2

From: Revisiting imaging features of rectosigmoid vascular malformation with emphasis on multiparametric MRI: a case report

Fig. 2

The sagittal (a) and axial (b) T2W MR images show diffuse thickening in the wall of the rectosigmoid colon characterized by increased signal intensity. The hypointense serpiginous areas represent dilated tortuous venous structures (thick arrows), and multiple round hypointense foci represent phleboliths. The mesorectal fascia has increased heterogonous signal intensity (asterisk). The lesion does not show diffusion-restriction on DWI (c) and ADC map (d). The lesion does not show prominent early or late contrast enhancement on the axial dynamic contrast-enhanced T1W images (e, f). However, the sagittal delayed contrast enhancement image (g) reveals that the lesion has heterogonous diffuse contrast enhancement (g). Overall, the lesion shows decreased perfusion (e) interspersed with highly perfused areas consistent with the dilated venous structures (arrows) (h)

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