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Updated: May 23, 2026

Isolating Central Nervous System Tissues and Associated Meninges for the Downstream Analysis of Immune cells
Published on: May 19, 2020
[Immune reconstitution inflammatory syndrome in cryptococcal meningitis: a rare phenomenon?]
K Schulze1, S Schmiedel, J van Lunzen
1Sektion Infektiologie und Tropenmedizin, I. Medizinische Klinik und Poliklinik, Universitätsklinikum Hamburg-Eppendorf. kschulze@uke.de
Insights
Cryptococcal meningitis can occur in untreated HIV patients. Immune reconstitution inflammatory syndrome (IRIS) is a key differential diagnosis for atypical disease courses, treatable with steroids.
Area of Science:
- Infectious Diseases
- Neurology
- Immunology
Background:
- Human Immunodeficiency Virus (HIV) infection can lead to opportunistic infections, including cryptococcal meningitis.
- Cryptococcal meningitis presents with neurological symptoms such as headache, photophobia, and nausea.
- Early diagnosis and treatment are crucial for managing cryptococcal meningitis in HIV patients.
Observation:
- A patient with untreated HIV presented with symptoms suggestive of meningitis.
- Diagnosis of cryptococcal meningitis was confirmed by cerebrospinal fluid analysis, including India ink stain, culture, and antigen testing.
- The patient experienced a worsening clinical course despite initial antifungal and antiretroviral therapy.
Findings:
- The patient was diagnosed with cryptococcal meningitis and subsequently developed immune reconstitution inflammatory syndrome (IRIS).
- IRIS, a complication of antiretroviral therapy initiation in HIV-associated infections, presented atypically.
- Adjuvant steroid treatment led to clinical improvement within six months.
Implications:
- Cryptococcal meningitis should be considered in HIV patients with neurological symptoms.
- India ink stain, CSF culture, and antigen detection are vital diagnostic tools.
- IRIS is a critical differential diagnosis for atypical presentations of HIV-associated infections and is effectively managed with steroids.
History And Admission Findings:
A 38-year old patient with previously untreated HIV infection presented with progressive cephalgia, photophobia, polydpsia and nausea/vomiting.
Investigations:
Clinical findings revealed a reduced general state of health and focal neurological deficits. Laboratory findings demonstrated a lymphocytopenia. In addition to positive crytococcus culture and antigen titer in cerebrospinal fluid/serum, Cryptococcus neoformans was detected by light microscopy (India ink stain) in cerebrospinal fluid.
Diagnosis, Treatment And Course:
A cryptococcal meningitis was diagnosed. After initiating antifungal and antiretroviral treatment the clinical course worsened after months 2, 3, and 5, respectively. Apart from unspecific inflammation in the lab work, no signs of disease relapse or therapy refractory course were found in additional diagnostics. After critical evaluation of the clinical course and diagnostic results, immune reconstitution inflammatory syndrome (IRIS) was diagnosed. Clinical improvement was achieved during adjuvant treatment with steroids within six months.
Conclusions:
In the presence of neurological symptoms, cryptococcal meningitis is a rare but possible differential diagnosis in daily routine. Diagnosis can be easily achieved by India ink stain in combination with culture of cerebrospinal fluid as well as antigen detection in most cases. Tests of antifungal resistance should be reserved for patients who do not respond to initial treatment, patients with atypical course of disease or failing longterm antifungal therapy. The IRIS is no rare complication after initiation of antiretroviral treatment in HIV associated cryptococcal infections. It is an important differential diagnosis in an atypical course of disease, and sufficient treatment is usually achieved by steroids.
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