TGM2 and triple-A syndrome: On the other hand, tTG-Ab were able to distinguish patients with severe lesions (M/O type 3) from those with milder ones (M/O type 0-1); as recently described [23,24], we can confirm that IgA-AAA assay does not add to tTG-Ab assay better performances in sensibility, specificity and correlation with the degree of intestinal lesion.