A cavernous hemangioma is a benign growth composed of large, blood-filled vascular channels, and it is the most common benign tumor found in the liver. On ultrasound, a typical hepatic hemangioma appears as a small, well-circumscribed, homogeneously hyperechoic (bright) mass, usually less than 3 centimeters in diameter, with posterior acoustic enhancement. This classic appearance is so characteristic that many hemangiomas can be confidently diagnosed on ultrasound alone without further imaging. Larger hemangiomas may have a more heterogeneous appearance and sometimes require confirmation with contrast-enhanced ultrasound, MRI, or CT scanning to distinguish them from malignant tumors.
Sonography Term