Subscapular elastofibrolipoma: a new variant type among elastofibromas or lipomas? A case report.

Elastofibroma is a rare soft tissue benign fibrous proliferation that characteristically occurs in periscapular soft tissues of the elderly, particularly in females, with typical morphological features consisting of an admixture of excessive collagen and abnormal elastic fibers displaying a beaded or globular appearance. Here we report an unusual, recently described histological variant with unclear origin, showing the presence of abundant mature fat tissue, named 'elastofibrolipoma', which could lead to confusion with other adipose and mesenchymal cell tumour proliferations. The issue as to whether elastofibrolipoma is reactive or neoplastic, variant of elastofibroma or lipoma, remains controversial. Differential diagnostic problems and histogenetic considerations are provided.