31/08/2026
The lipedema genetics conversation is changing đđ§Ź
Not just âwhat genes did you inherit?â but âwhatâs happening inside the affected tissue?â
Thatâs the idea behind somatic mosaicism - when a genetic change happens after fertilization, so only SOME cells carry it. Blood can look normal while affected tissue tells a different story.
This isnât proven in lipedema - itâs an emerging hypothesis researchers are starting to explore. Lipedema is currently understood as polygenic/complex, not caused by one single gene.
I used the case of Mandy Sellars (PIK3CA-related overgrowth spectrum / PROS is not lipedema) in the slides to show how mosaicism can work in overgrowth conditions. Same lesson: sometimes you have to look in the tissue, not just the blood.
Fascinating shift, right?
References:
Michelini S, et al. Unraveling lipedema: comprehensive insights and the path to future discoveries. npj Metabolic Health and Disease. 2024.
2. Child AH, et al. Lipedema: An Inherited Condition. Familial clustering suggests genetic etiology but mode is challenging; supports polygenic model with multiple susceptibility genes. ďżź
3. Keppler-Noreuil KM, et al. PIK3CA-related overgrowth spectrum (PROS): Diagnostic and testing criteria. PROS disorders can be caused by mosaic PIK3CA mutations. Example of somatic mosaicism in overgrowth. ďżź
4. Luks VL, et al. Case reports: Whole-exome sequencing on resected tissue revealed PIK3CA c.3140A>G with 11% mosaicism leading to PROS diagnosis (CLOVES). Illustrates tissue-specific mosaicism detection. ďżź