Elastofibroma
Definition
- Fibrous mass characterized by beaded elastic fibers, generally infrascapular
Alternate / Historical Names
- Elastofibroma dorsi
- Elastofibroma scapulae
Diagnostic Criteria
- Nearly always infrascapular
- Located deep to latissimus dorsi and rhomboid muscles
- Rarely reported from other sites including:
- Foot, hand, arm
- Lower back, neck
- GI tract
- Non-circumscribed, rubbery mass
- Does not infiltrate muscle
- Low power appearance is nondescript mixture of fibrous tissue and fat
- Paucicellular
- Diagnostic feature is coarsely beaded aggregates and strands of elastic tissue
- Eosinophilic on H&E stain
- Intensely positive on elastic stain
Robert V Rouse MD
Department of Pathology
Stanford University School of Medicine
Stanford CA 94305-5342
Original posting: November 20, 2007
