PRTN3 and vasculitis: There is a known association between AATD and cytoplasmic staining anti‐neutrophil cytoplasmic antibodies (c‐ANCA) vasculitis, specifically granulomatosis with polyangiitis, with increased risk in those with PI Z and S (Mahr et al., 2010); however, there have been no reports or mechanistic literature to support AATD manifesting in MMD, and patient's skin biopsy results were felt to be inconsistent with those typically seen in AATD.