Evaluation of whether the ultrasonographic onion skin sign is specific for the diagnosis of an appendiceal mucocele

Conclusions
The onion skin sign in the lower abdomen appears to be specific for the diagnosis of an appendiceal mucocele. In cases where the onion skin sign is obviously present in the lower abdomen on US, an appendiceal mucocele should be considered as the leading diagnosis.

Source: Journal of Medical Ultrasonics - October 1, 2014 Category: Radiology Source Type: research