Elastofibroma pathology

Author: Adjunct A/Prof Patrick Emanuel, Dermatopathologist, Clínica Ricardo Palma, Lima, Peru. DermNet NZ Editor in Chief: Adjunct A/Prof Amanda Oakley. Copy edited by Maria McGivern/Gus Mitchell. June 2018. 


Introduction

Elastofibroma usually presents on the back (usually in the subscapular region) as a poorly defined mass or pseudotumour. It is also called elastofibroma dorsi. Repetitive manual labour is thought to give rise to degeneration of elastic and fibrous tissues.

Histology of elastofibroma

In elastofibroma, the histopathology shows dense accumulation of eosinophilic tissue irregularly interdigitated into adipose tissue (figure 1). A higher power examination shows collagen bundles that alternate with large, thick eosinophilic elastic fibres (figures 2–4). 

Elastofibroma pathology

Special studies for elastofibroma

Elastic stains can be used to highlight the morphology of the abnormal elastic fibres. The elastic fibres may be fragmented into linear globules, which are described as beads on a string. 

Differential diagnosis for elastofibroma

Other diagnoses to be considered include:

  • Nuchal fibroma — these typically don’t have the characteristic abnormal elastic fibres seen in elastofibroma.
  • Desmoid fibromatosis — this is more cellular and infiltrates skeletal muscle; the characteristic abnormal elastic fibres seen in elastofibroma are absent.

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Related information

 

References

  • Daigeler A, Vogt PM, Busch K, et al. Elastofibroma dorsi — differential diagnosis in chest wall tumours. World J Surg Oncol 2007; 5: 15. DOI: 10.1186/1477-7819-5-15. PubMed Central

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