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Characterization of two distinct lipomas: a comparative analysis from surgical perspective
Hak Chang1, Seong Oh Park1, Ung Sik Jin1
1a Department of Plastic and Reconstructive Surgery , Seoul National University College of Medicine , Seoul , Korea.
Journal of Plastic Surgery and Hand Surgery
|October 13, 2017
Summary
Non-encapsulated lipomas, unlike typical lipomas, exhibit increased lymphatic vessels and enhanced cell proliferation. These findings offer new insights into the distinct pathogenesis and pathophysiology of these common soft tissue tumors.
Area of Science:
- Surgical Pathology
- Dermatology
- Oncology
Background:
- Lipomas are common benign soft tissue tumors, typically well-circumscribed.
- Adipose masses lacking clear demarcation from surrounding fat are frequently observed.
- This study differentiates between encapsulated and non-encapsulated lipoma subtypes.
Purpose of the Study:
- To analyze two distinct types of lipomas from a surgical perspective.
- To compare clinical, histological, and cellular characteristics of encapsulated versus non-encapsulated lipomas.
- To elucidate the pathogenesis and pathophysiology of lipomas.
Main Methods:
- Thirty patients undergoing lipoma excision were analyzed.
- Lipomas were classified as encapsulated (n=20) or non-encapsulated (n=10).
- Comparative analysis included clinical variables, histology, and adipose-derived stem cell (ASCs) characterization.
Main Results:
- Non-encapsulated lipomas were linked to older patient age, larger tumor size, and increased seroma formation.
- Increased lymphatic vessel density and related gene expression (lymphatic, inflammation, proliferation) were observed in non-encapsulated lipomas.
- ASCs from non-encapsulated lipomas demonstrated enhanced proliferation in culture.
Conclusions:
- Non-encapsulated lipomas possess distinct lymphatic histology and cellular responses compared to encapsulated types.
- Adipose-derived stem cells from non-encapsulated lipomas show unique proliferative characteristics.
- These differences provide insights into the underlying pathogenesis and pathophysiology of lipomas.
