Related Experiment Video
Updated: Oct 20, 2025

Author Spotlight: Advancing Pathogen Detection and Disease Assessment in Real-Time Using M-ROSE
Published on: March 1, 2024
A Rare Presentation of Cryptococcal Meningitis in a Treatment-Naive Patient with Sarcoidosis
Mehak Qureshi1, Basel Abdelazeem1, Ashiya Khan1
1McLaren Health Care, Flint/Michigan State University, Flint, Michigan, USA.
Abstract:
Cryptococcus neoformans is an encapsulated, yeast-like fungus that commonly lives in the environment due to soil contamination by the faeces of birds, especially pigeons. Cryptococcus is an opportunistic fungal infection frequently diagnosed in immunocompromised patients with HIV, steroid use, malignancy, history of organ transplantation, or, rarely, sarcoidosis. There have been only a few reports of cryptococcus infection in sarcoidosis patients who were not on steroid treatment. Here, we highlight the importance of considering opportunistic fungal infection in asymptomatic treatment-naive sarcoidosis patients. We present a patient with a history of asymptomatic, treatment-naive sarcoidosis who presented with headache and was diagnosed with cryptococcal meningitis in the presence of an idiopathic T-cell lymphopenia.
Learning Points:
Cryptococcus is an opportunistic fungal infection commonly diagnosed in immunocompromised patients.Sarcoidosis is a multi-systemic disease characterized by the formation of granulomas in various organs, most commonly found in the lungs and mediastinal lymph nodes.
Insights
Opportunistic fungal infections like cryptococcosis can occur in sarcoidosis patients, even if they have not started treatment. This case highlights the need to consider fungal infections in asymptomatic, treatment-naive sarcoidosis patients.
Area of Science:
- Mycology
- Infectious Diseases
- Immunology
Background:
- Cryptococcus neoformans is an encapsulated fungus found in the environment.
- Cryptococcosis is an opportunistic infection common in immunocompromised individuals (HIV, transplant recipients, malignancy, steroid users).
- Rare cases of cryptococcosis have been reported in sarcoidosis patients, particularly those on steroids.
Purpose of the Study:
- To emphasize the importance of considering opportunistic fungal infections in asymptomatic, treatment-naive sarcoidosis patients.
- To present a case of cryptococcal meningitis in a patient with untreated, asymptomatic sarcoidosis and idiopathic T-cell lymphopenia.
Main Methods:
- Case report presentation.
- Clinical diagnosis of cryptococcal meningitis.
- Assessment of patient's sarcoidosis status (asymptomatic, treatment-naive).
- Identification of underlying T-cell lymphopenia.
Main Results:
- A patient with asymptomatic, treatment-naive sarcoidosis developed cryptococcal meningitis.
- The patient presented with headache and was found to have idiopathic T-cell lymphopenia.
- This case underscores the potential for cryptococcosis in sarcoidosis patients without typical risk factors.
Conclusions:
- Cryptococcosis is an opportunistic infection primarily seen in immunocompromised individuals.
- Sarcoidosis is a granulomatous disease affecting multiple organs, commonly the lungs.
- Opportunistic fungal infections should be considered in asymptomatic, treatment-naive sarcoidosis patients, even in the absence of steroid use.
Related Concept Videos
Fungal Phylum Microsporidia
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Pulmonary Tuberculosis IV
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories:
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...

