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[Morphologic analysis of 14 cases of hepatic angiomyolipoma]
Objective:
To study the morphology of hepatic angiomyolipoma (HAML).
Methods:
HE staining, PAS staining, immunohistochemistry and electronic microscopy were used to study 10 cases from our department and 4 cases from consultation.
Results:
All 14 HAML cases showed perivascular epithelioid cells (PEC) with 4 different types of morphology. They presented characteristic PAS positivity premelanosome like structures and dense body under electronic microscopy. Immunohistochemistry demonstrated positive reaction for both actin and HMB45.
Conclusion:
Light and electronmicroscopic features and immunophenotype of HAML are characteristic of PEC related lesion.
Insights
Hepatic angiomyolipoma (HAML) morphology is characterized by perivascular epithelioid cells (PEC) with distinct features. These findings confirm HAML as a PEC-related lesion, aiding in diagnosis.
Area of Science:
- Pathology
- Gastroenterology
- Oncology
Context:
- Hepatic angiomyolipoma (HAML) is a rare liver tumor.
- Accurate diagnosis relies on understanding its unique cellular components.
Purpose:
- To investigate the morphological characteristics of hepatic angiomyolipoma (HAML).
- To elucidate the cellular origin and immunophenotype of HAML.
Summary:
- This study analyzed 14 HAML cases using HE staining, PAS staining, immunohistochemistry, and electron microscopy.
- Results revealed perivascular epithelioid cells (PEC) with diverse morphologies, PAS positivity, premelanosome-like structures, and dense bodies.
- Immunohistochemistry confirmed positive reactions for actin and HMB45.
Impact:
- The findings establish the characteristic light and electron microscopic features and immunophenotype of HAML.
- This research contributes to the classification of HAML as a PEC-related lesion.
- Enhanced diagnostic criteria for HAML in clinical practice.