RT Journal Article SR Electronic T1 Mixed cryoglobulinemia: a diagnostic and therapeutic challenge JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr-2017-219768 DO 10.1136/bcr-2017-219768 VO 2017 A1 Maria TĂșlio A1 Liliana Carvalho A1 Tiago Bana e Costa A1 Cristina Chagas YR 2017 UL http://casereports.bmj.com/content/2017/bcr-2017-219768.abstract AB Mixed cryoglobulinemia is frequently secondary to hepatitis C virus infection. Diagnosis and therapeutic management are challenging, depending on the spectrum and severity of manifestations, as well as on the presence of comorbidities. We describe a case of a 79-year-old woman with a non-cirrhotic hepatitis C virus infection presenting with weakness, arthralgias, purpuric rash with left leg ulcerative lesions, bilateral peripheral sensorimotor polyneuropathy, renal impairment and cardiac failure. The investigation was compatible with a severe type II mixed cryoglobulinemia with multisystemic involvement, including a low-grade B cell lymphoma and concomitant intestinal tuberculosis. Initial management with immunosuppressive therapy with glucocorticoids to control symptoms and simultaneous tuberculosis treatment was required. Unavailability of adequate antiviral treatment led to the need to control the severity of systemic manifestations with rituximab, before the effective aetiological treatment with sofosbuvir and ledipasvir was possible, allowing the definitive resolution of the disease.