[2] In 1903, he left for Paris, where he attended the surgical clinics of professors Henri Albert Hartmann, Théodore Tuffier, and Paul Poirier.
Working in the latter's anatomical laboratory, his aptitude was quickly noticed and he was selected to prepare the dissection specimens that the professor used in his courses.
During this period, Tănăsescu published a number of works on anatomy that showed his meticulousness as a researcher and wish to explore more obscure areas.
In 1912, when Ernest Juvara left for the national capital Bucharest, he was named professor of topographic anatomy and clinical surgery.
[5] Alongside his prodigious publishing activity, Tănăsescu was president of the Iași doctors' and naturalists' society from 1914 to 1920[3] and corresponding member of the Société Nationale de Chirurgie from 1929.