Attention to cryptococcal meningitis in patients with primary nephrotic syndrome

Abstract

Madam, An important opportunistic pathogen called cryptococcus neoformans typically affects those who have compromised immune systems.1 AIDS-associated cryptococcal infections now account for 80 – 90% of all patients with cryptococcosis. Among HIV-negative patients with cryptococcal infection, studies indicated that 41 – 61% of these patients received immunosuppressive drugs, most had systemic lupus erythematosus and cancer, and only a few patients had primary nephrotic syndrome (PNS).2 In PNS patients, steroid or immunosuppressive medication results in immunologic dysfunction, which enhances the risk of infection. Cryptococcal meningitis (CM) is an unusual and frequently fatal complication in patients with PNS.3 Because the clinical features of CM are normally atypical and the diagnosis is usually neglected, the infection develops and neurological injury arises. Furthermore, limited information is available about the clinical characteristics of PNS with CM to date. Usual clinical features include nausea, vomiting, headache, meningeal irritation indications, and fever, the latter of which was the early and common sign of CM.4 The CM diagnosis were based on the extracting cryptococcus neoformans from the cerebrospinal fluid (CSF) or a positive India ink staining. The opportunistic fungus pathogen Cryptococcus neoformans or Cryptococcus gattii, with C. neoformans predominating worldwide, causes CM, an infection of the meninges. CM is typically an immune-compromised condition with high morbidity and death rates, especially in those patients with HIV. Without anti-fungal therapy, the mortality rate in CM patients was reported to exceed 100%, and even after taking widely available anti-fungal medications, it can still be relatively high (20–60%).5 Moreover, the widespread use of corticosteroids and other immunosuppressive medications, particularly broad-spectrum antibiotics, by medical practitioners has steadily raised concerns about the occurrence of CM in HIV-negative patients. Although immunosuppressive medications and corticosteroids are the primary treatment for PNS, these agents enhance immune system impairment. As a result, among those patients with PNS, infection is one of the most frequent complications, even CM and invasive fungal infections. There have been some case reports of CM in PNS patients from various countries, with China having the majority of these reports due to the country's high NS patient population.5 The induction, consolidation, and maintenance phases of CM treatment are designated in the updated Infectious Diseases Society of America recommendations published in 2010. For non-HIV and non-transplant patients, amphotericin B liposome plus 5-fluorocytosine is the optimum therapy option during the induction period.4 But during the treatment, these medications need to be cared for their side effects. ---Continue

Keywords

• primary nephrotic syndrome
• Meningitis