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Deep Dermal Injection As a Model of Candida albicans Skin Infection for Histological Analyses
Published on: June 13, 2018
Deep cutaneous fungal infections in immunocompromised children
Danielle Marcoux1, Fatemeh Jafarian, Valérie Joncas
1Division of Dermatology, CHU Sainte-Justine, Montreal, Quebec, Canada. danmarcoux@videotron.ca
Background:
Life-threatening infections from ubiquitous fungi are becoming more prevalent in adults and children because of the increased use of immunosuppressive agents and broad-spectrum anti-infective drugs. Extremely low birth weight premature neonates and patients with a disrupted epidermal barrier are also at increased risk. Lethality is high, particularly with delayed diagnosis. As cutaneous lesions are often the first manifestation of such infections, early recognition of suspicious lesions is crucial to decrease associated morbidity and mortality. The clinical features of deep cutaneous fungal infection (DCFI) in immunocompromised children deserve special attention.
Objectives:
This study aimed to characterize our pediatric patients with DCFI, the causative fungi, and the associated risk factors.
Methods:
A medical record review was conducted of pediatric patients with DCFI treated at out institution using data retrieved from the hospital's pathology and microbiology database (1980-2008).
Results:
In all, 26 patients with DCFI were identified (9 girls and 17 boys) ranging in age from 1 day to 18 years (mean age: 8 years), the majority of whom had a hematologic disorder. All patients were immunocompromised, 90% were receiving broad-spectrum antibiotics, and 50% had severe neutropenia (absolute neutrophilic count < or = 500 x 10(6)/L). Necrotic ulcers (42%) and papules (34%) represented the most frequent lesion morphology. Fungal species were identified by culture in 20 (87%) of 23 patients tested and were observed histopathologically in 20 of 23 patients tested. Aspergillus was identified in 12 (44%) patients and Candida in 9 (33%). The other species included Fusarium (one), Exserohilum rostratum (one), Alternaria (one), Zygomycetes (two), and Blatomycetes (one). All but two patients received systemic antifungal therapy; wide surgical excision was performed in 13. Infection resolved in 20 (77%), whereas 6 (23%) died of disseminated infection.
Limitations:
This study was limited by the small number of cases and the retrospective nature of the collected data.
Discussion:
DCFI should rank high in the differential diagnosis of any suspicious skin lesions in immunocompromised children. Early biopsies should be performed for histopathology and microbiological analysis, as lethality is high if appropriate treatment is delayed.
Insights
Deep cutaneous fungal infections (DCFI) are a growing concern in immunocompromised children, often presenting with skin lesions. Early diagnosis and treatment are critical to reduce high mortality rates associated with these fungal infections.
Area of Science:
- Pediatric Infectious Diseases
- Mycology
- Dermatology
Background:
- Life-threatening fungal infections are increasing in children due to immunosuppression and broad-spectrum antibiotics.
- Premature neonates and individuals with compromised skin barriers are at higher risk.
- Delayed diagnosis of deep cutaneous fungal infections (DCFI) leads to high mortality.
Purpose of the Study:
- To characterize pediatric patients diagnosed with DCFI.
- To identify the fungi responsible for DCFI in children.
- To determine the risk factors associated with DCFI in pediatric cases.
Main Methods:
- Retrospective medical record review of pediatric patients with DCFI from 1980-2008.
- Data collected from institutional pathology and microbiology databases.
- Analysis of patient demographics, clinical presentation, causative fungi, and treatment outcomes.
Main Results:
- Twenty-six immunocompromised children (mean age 8 years) with DCFI were identified, predominantly with hematologic disorders.
- Common clinical presentations included necrotic ulcers (42%) and papules (34%).
- Aspergillus (44%) and Candida (33%) were the most common fungal pathogens identified; 77% of patients recovered, while 23% died.
Conclusions:
- DCFI must be considered in the differential diagnosis of skin lesions in immunocompromised children.
- Prompt skin biopsies for histopathology and fungal culture are essential for early diagnosis.
- Timely treatment is crucial to improve survival rates in pediatric DCFI cases.
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