A rare benign gastrointestinal disease characterized by the presence of abnormal and nonspecific gastro-intestinal (GI) manifestations, associated with an eosinophilic infiltration of the GI tract, which can affect several segments and involve several layers within the GI wall.

Inflammatory changes in the synovial membranes and articular structures with widespread fibrinoid degeneration of the collagen fibers in mesenchymal tissues, as well as atrophy and rarefaction of bony structures.