Extract

Gontijo-de-Amorim et al1 claim that fat enriched with the stromal vascular fraction (SVF) improves volume retention after facial lipotransfer. The authors describe a comparison of 5 patients injected with enriched fat vs 5 patients injected without SVF supplementation using computed tomography (CT). The authors report that the enriched fat group lost only 9.6% of its volume vs 24% in the untreated group.1 The authors simply centrifuge the lipoaspirate rather than separating it enzymatically using collagenase to isolate adipose-derived stem cells.1 Whether the cell pellet left at the bottom of the tube after centrifugation truly represents the SVF is open to question.2

Although box plots are included, the actual measurement data for the 10 patients are not reported. The authors provide 2 clinical examples along with their axial CT scan images. The area of fat injection is indicated by 2 linear measurements. It is not clear how volumes were calculated from these linear dimensions. Regardless, errors in these measurements beg disclosure.

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