Acrodermatitis Chronica Atrophicans, also known as acrodermatitis atrophicans chronica, is related to acrodermatitis and cryoglobulinemia. An important gene associated with Acrodermatitis Chronica Atrophicans is SNORA1 (Small Nucleolar RNA, H/ACA Box 1), and among its related pathways/superpathways is Extrafollicular and follicular B cell activation by SARS-CoV-2. Affiliated tissues include skin and bone marrow, and related phenotype is Strongly decreased CFP-tsO45G cell surface transport.