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Detection of Invasive Pulmonary Aspergillosis in Haematological Malignancy Patients by using Lateral-flow Technology
Published on: March 22, 2012
Insights
Invasive aspergillosis in immunocompromised children can present as severe soft tissue infections, not just sinus or lung issues. Early diagnosis via biopsy and radical surgical debridement are crucial for survival.
Area of Science:
- Medical Mycology
- Pediatric Infectious Diseases
- Surgical Pathology
Background:
- Invasive aspergillosis is a severe complication in immunocompromised children, often presenting as sinus or pulmonary infections.
- A significant proportion of these cases remain undiagnosed premortem, contributing to high mortality rates despite treatment.
Observation:
- This study reports on four immunocompromised children with invasive aspergillosis presenting with extensive soft tissue infections, distinct from typical presentations.
- Three cases involved traumatic leg injuries with significant contamination, and one occurred in a child with acute lymphocytic leukemia and neutropenia.
- All patients developed characteristic punctate black skin lesions with erythema, rapidly progressing despite initial debridement and amphotericin B therapy.
Findings:
- Histological examination revealed vascular invasion by fungal hyphae in all cases.
- Aggressive surgical intervention, including hemipelvectomies and chest wall resection, led to positive responses.
- Early biopsy of suspicious skin lesions is vital for identifying characteristic hyphal forms.
Implications:
- Invasive aspergillosis should be considered in immunocompromised children with unexplained soft tissue lesions, especially following trauma or with neutropenia.
- Prompt radical surgical debridement combined with antifungal therapy offers a potentially lifesaving approach.
- The initial surgical approach must encompass tissue beyond the visibly affected areas to ensure complete removal.
Abstract:
Aspergillosis may complicate the course of the child in an immunocompromised state. When sinus or pulmonary infections present in immunocompromised children, one third of these patients are diagnosed accurately premortem as resulting from aspergillosis and two thirds remain undiagnosed. Mortality remains quite high, despite prompt treatment. Four children in our hospital during the last 4 years have had invasive aspergillosis presenting other than sinus or pulmonary infections. Each presented with extensive soft tissue infection. Three presented after traumatic devascularizing injuries to the leg in which massive soil and fecal contamination occurred. One child presented with absolute neutropenia secondary to treatment of acute lymphocytic leukemia. The child had a chest wall lesion develop at the site of an EKG electrode. All patients had a punctate black skin lesion with a halo of intense erythema surrounded by a zone of blanching. These lesions rapidly expanded. Initial extensive debridement of the lesions, combined with systemic chemotherapy with amphotericin B failed to halt the progression of the disease. Histology showed vascular invasion with hyphal forms. Each patient then responded well to radical debridement (three hemipelvectomies and one chest well resection). The child in an immunocompromised state who develops a red papule, then a black eschar with surrounding erythema, should have immediate biopsy that can easily demonstrate the characteristic hyphal forms. Early radical surgical debridement and antifungal therapy can be lifesaving. The initial debridement should include tissues well beyond any apparent involvement.
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