Mucinous ascites secondary to peritoneal pseudomyxoma of an uncertain origin.

Peritoneal pseudomyxoma (PP) is a rare malignant tumor, which is characterized by the presence of mucinous ascites. Abdominal ultrasound as the first diagnostic method of this entity allows the visualization of ascites on the one hand and its analysis through a diagnostic paracentesis on the other.

IgG4-Related Disease: Results From a Multicenter Spanish Registry.

IgG4-related disease (IgG4-RD) is a rare entity consisting of inflammation and fibrosis that has been described in multiple organs. Concrete diagnostic criteria have been established recently and there is a lack of large series of patients.To describe the clinical presentation, histopathological characteristics, treatment and evolution of a series of IgG4-RD Spanish patients.