heterogeneous enhancement
Irregular, non-uniform contrast uptake pattern within a lesion, often indicating malignancy or complex pathology.
Full Definition
Heterogeneous enhancement refers to an irregular, patchy, or non-uniform pattern of contrast agent uptake within a lesion or tissue on contrast-enhanced imaging studies. This enhancement pattern typically appears as areas of varying signal intensity or attenuation mixed throughout the lesion, creating a mottled or irregular appearance. In oncologic radiology, heterogeneous enhancement is often associated with malignant tumors due to their irregular vascularity, areas of necrosis, and varying cellular density. This pattern contrasts with homogeneous enhancement, where contrast uptake is uniform throughout the lesion. Recognition of enhancement patterns is crucial for characterizing lesions and guiding further management.
Usage
Usage note: Distinguish from rim enhancement, which specifically describes peripheral uptake patterns.
In Context
- "The liver mass demonstrates heterogeneous enhancement on portal venous phase imaging." — CT interpretation report
- "Heterogeneous enhancement within the renal lesion raises suspicion for malignancy." — MRI findings description