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Non-Hodgkin lymphoma: predicting prognostic grade with MR imaging
S M Rehn1, R S Nyman, B L Glimelius
1Department of Oncology, University of Uppsala, Sweden.
Radiology
|July 1, 1990
Summary
Magnetic resonance (MR) imaging can help differentiate low-grade and high-grade non-Hodgkin lymphoma (NHL). Inhomogeneous MR imaging findings often indicate high-grade NHL, while homogeneous findings suggest low-grade NHL.
Area of Science:
- Oncology
- Radiology
- Medical Imaging
Background:
- Non-Hodgkin lymphoma (NHL) comprises distinct prognostic groups.
- Distinguishing between low-grade and high-grade NHL is crucial for treatment and prognosis.
- Current diagnostic methods may require invasive procedures.
Purpose of the Study:
- To evaluate the utility of magnetic resonance (MR) imaging in differentiating low-grade and high-grade NHL in vivo.
- To correlate MR imaging appearance with histopathological findings and patient outcomes.
Main Methods:
- Fifty patients with non-Hodgkin lymphoma underwent MR imaging.
- MR images were analyzed for signal intensity patterns (homogeneous vs. inhomogeneous).
- Imaging findings were correlated with histopathology and survival data.
Main Results:
- High-grade NHL nodes predominantly showed inhomogeneous MR imaging appearance (63%).
- Low-grade NHL nodes were mostly homogeneous (90%).
- Inhomogeneous patterns were associated with necrosis and, in some cases, transformation from low-grade to high-grade NHL.
- Patients with high-grade NHL and homogeneous patterns showed a trend towards better survival.
Conclusions:
- MR imaging can aid in distinguishing between low-grade and high-grade NHL based on image homogeneity.
- Inhomogeneous MR imaging findings may indicate aggressive disease or transformation.
- MR imaging characteristics may have prognostic implications in NHL.