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Granulocytic sarcoma in childhood leukemia: imaging features
M H Pui1, B D Fletcher, J W Langston
1Department of Diagnostic Imaging, St Jude Children's Research Hospital, Memphis, TN 38101.
Radiology
|March 1, 1994
Summary
Imaging features of granulocytic sarcoma (GS) in children with myelogenous leukemia were assessed. CT and MR imaging may help differentiate GS from other leukemia complications, potentially avoiding biopsies.
Area of Science:
- Pediatric Oncology
- Radiology
- Hematology
Background:
- Granulocytic sarcoma (GS) is a rare extramedullary tumor composed of immature myeloid cells.
- GS can occur in patients with myelogenous leukemia, presenting diagnostic challenges.
- Distinguishing GS from other leukemia complications like hematomas and abscesses is crucial for appropriate management.
Purpose of the Study:
- To evaluate the imaging characteristics of granulocytic sarcoma in pediatric patients diagnosed with myelogenous leukemia.
- To identify specific imaging findings that can aid in the diagnosis of GS.
Main Methods:
- Retrospective analysis of imaging studies including radiographs, bone scintigraphy, ultrasound (US), computed tomography (CT), and magnetic resonance (MR).
- Evaluation of imaging data from 31 patients with myelogenous leukemia (30 acute, 1 chronic).
Main Results:
- Radiographs, nuclear medicine, and US findings for GS were generally nonspecific.
- Magnetic resonance (MR) imaging showed parascapular GS as hyperintense on T2-weighted images.
- Central nervous system GS appeared isointense on T1 and T2 weighted MR images, with homogeneous contrast enhancement on CT and MR.
Conclusions:
- Computed tomography (CT) and MR imaging possess features that can help differentiate granulocytic sarcoma from other leukemia-related complications such as hematomas and abscesses.
- These advanced imaging techniques may reduce the need for invasive biopsy in some pediatric patients with suspected GS.