Pseudomyxoma peritoneii

Mucoceles of the appendix are relatively rare lesions. They vary considerably in size. Giant lesions up to 25 cm can be present. The large lesions are most often caused by mucus-producing tumours such as cystad-enoma or cystadenocarcinoma. Later, they can rupture and produce a Pseudomyxoma peritoneii. Small non-neoplastic lesions are found incidentally during imaging. 

Sonographically, mucoceles are cystoid or hypo-echogenic lesions. An onion-skin appearance has been described (Fig. 1.10 Dgani et al. 2002 Caspi et al. 2004). This echogenicity is thought to be caused by viscosity differences of the mucus. Colour Doppler is used to exclude vascularisation in the lesion. In Pseudomyxoma peritoneii encapsulated cystoid lesions are found in the peritoneum. 

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See also in sourсe #XX -- [ , ]

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