CD8A and hereditary angioedema: The nearly complete absence of CD4+ T-cells in the inflammatory infiltrates in the case described here indicates that other inflammatory cells, such as CD8+ T-cells or B-lymphocytes are important in driving inflammation and tissue injury in demyelinating HAE, while a disease phenotype of ADEM or polyradiculoneuritis may mainly be driven by a (CD4+) T-cell response, as suggested by its similarity to classical EAE models [2, 50].