Elastofibroma. A pseudotumor of myofibroblasts

Area of Science:

• Pathology
• Cell Biology
• Biomedical Science

Background:

• Elastofibromas are benign tumors.
• The cell of origin for elastofibromas has been debated.
• Myofibroblasts are implicated in wound healing and scar formation.

Observation:

• The cell of origin in elastofibroma exhibits characteristics of both fibroblasts and smooth muscle cells.
• These cells contain unique fibril stacks (100 Å diameter, 100 Å apart) within the cytoplasm.
• An abundance of rough endoplasmic reticulum was noted in these cells.

Findings:

• The cellular morphology suggests a myofibroblast lineage for elastofibroma cells.
• The presence of myofibroblasts aligns with their known role in tissue repair.
• Elastofibromas share cellular features with granulation tissue and hypertrophic scars.

Implications:

• Myofibroblasts are key players in the pathogenesis of elastofibromas.
• Constant subclinical trauma and subsequent repair processes may lead to elastofibroma development.
• Understanding the cellular origin aids in comprehending elastofibroma formation and potential therapeutic strategies.