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identification of Cryptococcus neoformans in cytologic preparations of cerebrospinal fluid
Abstract:
Review of routine Papanicolaou-stained cerebrospinal fluid preparations from 13 patients who had meningeal cryptococcosis documented by other methods demonstrated the yeast in 11 cases. Special stains greatly facilitated the detection of the organisms in two samples and discriminated them from artifacts. An increased number of cells was present in nine cases. Correlation with the clinical data revealed that every patient but one had a malignant lymphoma, most commonly Hodgkin's disease. The exception was a patient who had disseminated carcinoma of the breast treated with adrenal corticosteroids. The clinical history and the cellularity of the smear should alert one to the possibility of cryptococcosis.
Insights
Routine Papanicolaou-stained cerebrospinal fluid analysis detected Cryptococcus in 11 of 13 patients with meningeal cryptococcosis. Special stains aided detection, and clinical history, especially lymphoma, suggested this fungal infection.
Area of Science:
- Medical Mycology
- Cerebrospinal Fluid Analysis
- Infectious Diseases
Background:
- Meningeal cryptococcosis is a serious fungal infection, particularly in immunocompromised individuals.
- Accurate and timely diagnosis of fungal meningitis is crucial for effective treatment.
- Cerebrospinal fluid (CSF) analysis is a primary diagnostic tool.
Purpose of the Study:
- To evaluate the efficacy of routine Papanicolaou-stained cerebrospinal fluid preparations in diagnosing meningeal cryptococcosis.
- To assess the utility of special stains in identifying Cryptococcus in CSF.
- To correlate cytological findings with clinical data.
Main Methods:
- Retrospective review of Papanicolaou-stained CSF samples from 13 patients with confirmed meningeal cryptococcosis.
- Microscopic examination for yeast identification.
- Application of special stains when needed.
- Correlation of CSF findings with patient clinical history and diagnoses.
Main Results:
- Cryptococcus was identified in routine Papanicolaou stains in 11 out of 13 cases (84.6%).
- Special stains improved detection in two samples and helped differentiate yeast from artifacts.
- Increased cellularity in CSF was observed in nine patients.
- Most patients (12/13) had underlying conditions, predominantly malignant lymphoma (including Hodgkin's disease) or breast cancer treated with corticosteroids.
Conclusions:
- Routine Papanicolaou staining of CSF is a valuable method for detecting meningeal cryptococcosis.
- Special stains can enhance diagnostic yield and specificity.
- Clinical context, such as immunosuppression due to lymphoma or corticosteroid therapy, is critical for suspecting this fungal infection.