A case series of rituximab induced tuberculosis

Rituximab has a myriad of clinical uses, ranging from its disease modifying action in rheumatoid arthritis, to its role in chemotherapy for cancer. Being an anti CD20 monoclonal antibody, it controls inflammation by targeting peripheral B cells including those present in the synovium. The use of Rituximab is associated with some side effects such as cytopenias and increased risk of infections such as JC virus reactivation leading to multifocal encephalopathy. The role of Rituximab as an immunosuppressant has been established. However, its association with tuberculosis in endemic countries like India is yet to be understood well. The study was a cross sectional study of the two cases reported about the incidence of tuberculosis in patients receiving infusions of rituximab for rheumatoid diseases. These adverse drug reactions were reported to the nearest pharmacovigilance center through the Vigiflow portal of WHO and were assessed for their causality as per the WHO scale. A 45 year old male patient, a known case of Systemic Lupus Erythematosus, presented to a tertiary care hospital with high grade fever with chills and rigors after which he was diagnosed with pleural effusion due to tuberculosis. The patient was on immunosuppressants which included Rituximab, Mycophenolate Sodium, Prednisolone and Hydroxychloroquine. Rituximab was withdrawn and the remaining medications were continued as per the initial plan. A 19 year old male patient, a known case of dermatomyositis and dilated cardiomyopathy, presented to a tertiary care hospital with complaints of fever with chills and rigors, and breathlessness on exertion which was followed by the diagnosis of miliary tuberculosis. Earlier, the patient was on Rituximab, Cyclophosphamide, Hydroxychloroquine and Prednisolone. Plan of further infusions of Rituximab and Cyclophosphamide was terminated while the remaining medications were continued. Both the patients were put on anti tubercular therapy and are now improving. The association of bacterial infections like tuberculosis with the use of Rituximab is not well understood. However, Rituximab being an immunosuppressant can be considered to be related to this infection. In our case series we readdress this association through a literature review

A Review of Recent Advances in the Diagnosis of Cardiac Amyloidosis, Treatment of Its Cardiac Complications, and Disease-Modifying Therapies

Cardiac amyloidosis (CA), a significant condition resulting in infiltrative cardiomyopathy and heart failure with preserved ejection fraction (HFpEF), is caused by extracellular deposition of amyloid fibrils in the heart. Even though this has been known for an extended period, its prevalence in elderly patients with heart failure is increasingly being recognized. Recent advances in diagnosis with non-invasive methods like technetium pyrophosphate-labeled cardiac scintigraphy (i.e., Tc-PYP scan) and treatment options with tafamidis have played a pivotal role in awareness of the burden of this disease. Management of cardiac complications like heart failure, atrial arrhythmias, conduction block, ventricular arrhythmias, coronary artery disease, and aortic stenosis is now more critical than ever. We aim to review and outline the recent advances in diagnoses of CA. We also review management strategies for cardiac complications of CA with a brief summary of disease-modifying therapies