Liver mesenchymal neoplasms: something old, something new.

Area of Science:

• Pathology
• Oncology
• Gastroenterology

Background:

• Liver biopsies are crucial for diagnosing liver lesions, with hepatocellular carcinoma being common.
• Mesenchymal liver tumors are uncommon and pose diagnostic challenges for pathologists.
• Accurate diagnosis of liver lesions is critical for effective patient management.

Purpose of the Study:

• To review common and rare mesenchymal hepatic lesions based on WHO classification.
• To highlight diagnostic challenges in differentiating mesenchymal tumors from other liver lesions.
• To discuss the utility of immunohistochemistry and molecular studies in diagnosing these tumors.

Main Methods:

• Review of current World Health Organization (WHO) classification of mesenchymal hepatic lesions.
• Analysis of histological features, clinical presentation, and radiological findings.
• Evaluation of immunohistochemical panels and molecular findings.

Main Results:

• Mesenchymal liver tumors present diagnostic challenges due to overlapping features with other lesions.
• Histological examination, combined with clinical and radiological data, is essential.
• Immunohistochemistry and molecular studies significantly aid in accurate diagnosis.

Conclusions:

• Accurate diagnosis of mesenchymal liver tumors relies on integrating histological, clinical, radiological, immunohistochemical, and molecular data.
• Pathologists must be aware of these rare entities to avoid misdiagnosis.
• Advanced diagnostic tools are invaluable for challenging liver lesion cases.