Related Experiment Video
Updated: Jan 21, 2026

Automated Measurement of Cryptococcal Species Polysaccharide Capsule and Cell Body
Published on: January 11, 2018
Cryptococcal Meningitis Presenting as New-Onset Seizures in an Immunocompetent Patient
Andrea Akyeampong1, Nadia Solomon1, Nicholas A Boire1
11 St. George's University, True Blue, Grenada.
Abstract:
This report describes a 30-year-old immunocompetent male with new-onset seizures, later found on imaging to have 2 enhancing lesions in the brain. The patient underwent a left parietal craniectomy with resection of one of the masses, which demonstrated focal areas of necrosis and many small cystic structures positive for periodic acid-Schiff and Gomori's methenamine silver special stain. Numerous laboratory examinations, including HIV test, rapid plasma reagin, toxoplasma immunoglobulin G and immunoglobulin M, Lyme, cytomegalovirus, tuberculosis, cysticercosis, and Echinococcus serology, were all negative. Despite negative cerebrospinal fluid (CSF) culture and several negative CSF antigen tests, continued investigation, and follow-up, CSF antigen testing ultimately revealed Cryptococcus as the causative agent. In light of the mysterious and unusual presentation, the authors discuss potential infectious differential diagnoses in patients with atypical clinical presentation, laboratory tests, and surgical pathology.
Insights
A rare case of Cryptococcus infection presented as brain lesions causing seizures in an immunocompetent male. Diagnostic challenges highlight the importance of persistent investigation for unusual infectious causes.
Area of Science:
- Neurology
- Infectious Diseases
- Medical Mycology
Background:
- Central nervous system (CNS) infections can present with diverse neurological symptoms.
- Immunocompetent individuals are typically less susceptible to opportunistic fungal infections like Cryptococcus.
Observation:
- A 30-year-old immunocompetent male presented with new-onset seizures and two enhancing brain lesions on imaging.
- Surgical resection revealed necrotic and cystic brain tissue, but initial extensive laboratory testing for common pathogens was negative.
Findings:
- Despite negative cerebrospinal fluid (CSF) cultures and antigen tests, persistent investigation ultimately identified Cryptococcus as the causative agent via CSF antigen testing.
- The patient's presentation was atypical, challenging initial diagnostic assumptions.
Implications:
- This case underscores the importance of considering unusual infectious etiologies in patients with unexplained neurological symptoms and brain lesions.
- Diagnostic strategies for CNS infections may need to be broadened to include less common pathogens, even in immunocompetent hosts.
- Atypical presentations necessitate thorough and prolonged diagnostic workups to ensure accurate identification of causative agents.
More Related Videos
07:35Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
Published on: July 8, 2025
09:07Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
Related Concept Videos
Cranial and Spinal Meninges
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Development of Immunocompetence
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Patient-centered Care
Drug Dosing: Obese Patients