Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13023-020-01565-8/MediaObjects/13023_2020_1565_Fig1_HTML.jpg)
Abdominal fat pad biopsy procedure. How we perform an abdominal fat pad biopsy using an 8 mm skin punch. a Local anaesthesia with premixed lidocaine (10 mg/ml) with adrenaline (5 μg/ml) after disinfection with chlorhexidine (5 mg/ml). b Skin punch after applying a sterile drape and using sterile gloves. c Biopsy sample. d Cutting out additional fat using a pair of forceps and a pair of scissors. e Suture with thread size 4- 0, two simple interrupted sutures and one central vertical mattress suture is usually adequate. f Final biopsy sample, including skin punch and additional fat, in saline (sodium chloride 9 mg/ml)