Hepatic cavernous hemangioma: magnetic resonance imaging. Work in progress

Area of Science:

• Radiology
• Medical Imaging
• Hepatology

Background:

• Hepatic cavernous hemangiomas are common benign liver tumors.
• Accurate diagnosis is crucial for appropriate patient management.
• Distinguishing hemangiomas from other focal liver masses can be challenging.

Purpose of the Study:

• To prospectively evaluate the diagnostic performance of magnetic resonance (MR) imaging for hepatic cavernous hemangioma.
• To compare MR imaging with contrast-enhanced computed tomography (CT) and ultrasonography in lesion detection.
• To assess the specificity of MR imaging characteristics for hemangioma diagnosis.

Main Methods:

• Prospective evaluation of 11 patients with proved hepatic cavernous hemangioma.
• Utilized a 0.35-T superconducting magnet and spin echo imaging sequences.
• Compared MR findings with contrast-enhanced CT and ultrasonography.

Main Results:

• MR imaging identified more lesions than contrast-enhanced CT or ultrasonography.
• Hemangiomas exhibited consistent MR signal intensity patterns: isointense at short TR/TE, hyperintense at long TR, and greatly hyperintense at long TR/long TE.
• MR appearance was not entirely specific, with 2 of 14 other focal hepatic masses showing similar features. Calculated T1 and T2 relaxation times were not useful for characterization.
• An intensity ratio of hemangioma to normal liver (>1.4) at TR=2.0s, TE=56ms was a useful diagnostic indicator.

Conclusions:

• MR imaging is a sensitive tool for detecting hepatic cavernous hemangiomas.
• While MR shows characteristic signal intensities, its specificity is limited.
• A specific intensity ratio on MR imaging can aid in differentiating hemangiomas from other liver masses.