Spindle Cell Lipoma of the Posterior Axilla: A Case Report

it was first introduced by Enzinger and Harvey (1). The three principal components of spindle cell lipoma are mature adipocytes, small, undifferentiated spindle cells and short bundles of brightly eosinophilic collagen that are associated with the spindle cells. The relative proportion of these three elements within a given lesion varies quite markedly, with the spindle cell areas accounting for anytwhere from 1% to 90% of the examined surface area. The imaging findings of this spindle cell lipoma are also variable according to the proportion of the non-adipose components (2). This non-adipose component within a spindle cell lipoma can make it challenging to differentiate lipoma or other benign lipomatous lesions from liposarcoma (3, 4). We report here on a case of spindle cell lipoma of the posterior axilla and we discuss what findings could be helpful to differentiate it from liposarcoma. We also review the relevant literature.