Breast implant seroma: A SARS‐CoV‐2 mRNA vaccine side effect

Kayser, Françoise; Fourneau, Hadrien; Mazy, Olivier C.; Mazy, Stéphane

Fluid collection surrounding breast implants, called seroma, is a frequent issue that has diverse etiologies. We describe a 48‐year‐old woman with an acute onset of bilateral breast swelling occurring 5 years after aesthetic surgery and 10 days after a second SARS‐CoV‐2 mRNA vaccine dose. At breast ultrasound, we found an abundant bilateral peri‐implant seroma. Our patient noticed symptom improvement 48 h after nonsteroidal anti‐inflammatory drug treatment, complete disappearance of symptoms after 10 days with seroma disappearance documented by ultrasound. We hypothesized a breast implant seroma as post‐SARS‐CoV‐2 mRNA vaccine side effect, as different other diagnosis had been excluded.