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Published on: August 16, 2013
Early imaging differentiation of children with acute hematologic malignancies that present in pancytopenia: a
1Department of Radiology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Children and Adolescents' Health and Diseases, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Child Rare Diseases in Infection and Immunity, Chongqing, China.
Insights
Computed tomography (CT) findings can help differentiate pediatric hematologic malignancies presenting with acute pancytopenia. Thoracic and abdominal CT features show distinct patterns aiding in the diagnosis of malignancy-associated hemophagocytic lymphohistiocytosis (M-HLH) versus acute leukemia (AL) and Epstein-Barr virus-associated HLH (EBV-HLH).
Area of Science:
- Pediatric Hematology
- Radiology
- Oncology
Background:
- Acute pancytopenia in children can be caused by several hematologic malignancies, including malignancy-associated hemophagocytic lymphohistiocytosis (M-HLH), acute leukemia (AL), and Epstein-Barr virus-associated HLH (EBV-HLH).
- Differentiating these conditions is crucial for timely and appropriate treatment, but overlapping clinical presentations can pose diagnostic challenges.
Purpose of the Study:
- To identify and analyze distinctive thoracic and abdominal computed tomography (CT) features that can differentiate between M-HLH, AL, and EBV-HLH in pediatric patients presenting with acute pancytopenia.
- To establish potential CT-based indicators for supporting the differential diagnosis of these hematologic malignancies.
Main Methods:
- A retrospective cohort study involving 133 pediatric patients with acute pancytopenia was conducted at the Children's Hospital of Chongqing Medical University.
- Patients were categorized into three groups: M-HLH (n=23), AL (n=58), and EBV-HLH (n=52).
- Thoracic and abdominal CT features were statistically analyzed to identify significant intergroup differences, including measurements of largest lymph nodes (LLNs) and specific lesion types.
Main Results:
- Significant differences in thoracic CT findings were observed, including pulmonary lesions, bronchiovascular bundle thickening, and pleural effusion.
- Mediastinal LLNs were significantly larger in M-HLH compared to AL and EBV-HLH, with specific cutoff values identified.
- Abdominal CT revealed significant differences in widened periportal space, ascites, splenomegaly, and intrarenal lesions, with larger abdominal LLNs noted in M-HLH.
Conclusions:
- Thoracic and abdominal CT manifestations exhibit distinct patterns among pediatric hematologic malignancies presenting with acute pancytopenia.
- CT imaging provides valuable supportive clues for the differential diagnosis of M-HLH, AL, and EBV-HLH in children.
- Radiological findings can aid clinicians in distinguishing between these serious conditions, facilitating prompt and accurate diagnosis.
Objectives:
This retrospective cohort study aimed to identify potential differentiation indicators on thoracic and abdominal computed tomography (CT) among three hematologic malignancies characterized by acute pancytopenia in children.
Methods:
This study was conducted at the Children's Hospital of Chongqing Medical University, Chongqing, China. A total of 133 children with acute pancytopenia from August 2016 to November 2024 were enrolled, including 23 with malignancy-associated hemophagocytic lymphohistiocytosis (M-HLH), 58 with acute leukemia (AL), and 52 with Epstein-Barr virus-associated HLH (EBV-HLH). The differences in thoracic and abdominal CT features were statistically analyzed.
Results:
Chest CT showed significant intergroup differences in pulmonary lesions, thickening of the bronchiovascular bundle, and pleural effusion. Mediastinal largest lymph nodes (LLNs) in M-HLH were significantly larger, with receiver operating characteristic (ROC)-derived cutoff values of 11.45 mm (M-HLH vs. AL, sensitivity 65.2%, specificity 98.2%) and 11.60 mm (M-HLH vs. EBV-HLH, sensitivity 65.2%, specificity 100%), predominantly located in the retroinnominate space. Abdominal CT revealed significant differences in widened periportal space, ascites, splenomegaly, and intrarenal lesions. Abdominal LLNs in M-HLH were larger, with cutoff values of 9.3 mm (M-HLH vs. AL, sensitivity 72.7%, specificity 77.2%) and 9.60 mm (M-HLH vs. EBV-HLH, sensitivity 72.7%, specificity 75.0%).
Conclusions:
Thoracic and abdominal CT manifestations are usually different among pediatric hematologic malignancies that present in acute pancytopenia, providing valuable supportive clues for differential diagnosis.
