Pierre Lassus (11 April 1741 â 16 March 1807) was a French surgeon born in Paris.
He was a one-time surgeon to the daughters of Louis XV, and in 1795 worked with Philippe-Jean Pelletan (1747âÂÂ1829), Nicolas Dieudonné Jeanroy (1750âÂÂ1816) and Jean-Baptiste Dumangin (1744âÂÂ1826) on the autopsy of 10-year-old Louis XVII.
In 1802 he was appointed secrétaire perpétuel of the physical sciences section at the Institut de France. In 1804 he was chosen by Jean-Nicolas Corvisart (1755âÂÂ1821) as a consultant-surgeon of the Emperor.